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Decorating 101: How to Cover a Cake with Royal Icing

(For Cookies)

Paste food colors will tint Royal icing the richest, deepest hues. Use a clean wooden pick to dip into color, then into icing. Stir to mix. If the colors start to separate, gently massage the bag to remix the icing.

Royal Icing or glacé royal is made by beating together sugar and egg whites. Working with royal icing is the most important aspect of cake decorating. When it dries, it lasts almost indefinitely.

Purchase Already Made Royal Icing Flowers 
or Animals

Royal Icing is one of the most versatile icings to use in decorating

The traditional Royal Icing is a mixture of powdered (also known as confectioner's sugar), varying amounts of water, depending upon the consistency needed, and egg whites or meringue powder (if consuming, a raw egg white substitute, such as powdered egg white powder or meringue, are the safest to use). A teaspoon of glycerin can be added which softens it. Sometimes Royal icing is enhanced with flavor, such as extracts. It can also be used as it's natural color of white or tinted before using. 

Royal Icing Recipes: If you are going to eat the icing on a piece of cake or a cookie, I recommend making Safe Royal Icing. It is made with dried pasteurized egg whites or meringue powder. The other Royal Icing Recipe is made with raw egg whites, and cannot be consumed. It is best used when decorating or gluing together gingerbread houses, that are typically not consumed.
DID YOU KNOW?...Royal Icing originated in England, where it was first prepared for special occasions such as weddings, anniversaries, and baptisms. However, this sweet, regal topping did not fare as well in other countries' more humid climates, and it went out of favor for some time.

Royal Icing can be thinned with water and used to paint a picture with. With thick icing, you trace the outline of a picture placed under waxed paper. Immediately use icing that is thinner to fill in between the lines. After it dries, it is carefully lifted off the wax paper and set down on the cake.

Royal Icing turns soft when it comes into contact with any type of grease or oil, or high humidity. Be sure that all of your tools are free of grease before using to mix or decorate with.

There are some tips for piping royal icing on top of buttercream icing. Click here.

Royal Icing can be made ahead. When storing it, make sure you keep it covered, airtight at room temperature, if made with meringue powder, or in the refrigerator, if made with raw egg whites. If already in a pastry bag, you can store as is as long as you put a damp paper towel around its tip, held in place with a rubber band. I like to put my bags in a larger airtight plastic bag, as well. If any of the Royal Icing has crusted during storage, it cannot be used. If too stiff after storing, rebeat with an electric mixer at low speed first. I've noticed that mixing thin icing for several minutes after storing tends to thicken it up, so add more liquid, a drop at a time, to thin it. If in a pastry bag, knead the bag until the Royal Icing is more pliable.

Piping Royal Icing:

Royal Icing can be made in different consistencies and can be spread with an icing spatula, a fine-tipped paintbrush, or piped with a pastry bag or decorating cone. The icing can be thinned or thickened by varying the amount of water (thinner) and sugar (thicker). A thinner icing is best for flooding, since it spreads more smoothly; a thicker icing (with more sugar) is best for piping. 

When you're working with Royal Icing, it dries easily when exposed to air, so it's best to keep a damp towel over the bowl, topped with a piece of plastic wrap at all times. Make sure you re-mix it frequently. If using filled decorating bags, place the ones you aren't using upside down in a glass with a wet paper towel in the bottom to keep the tip moist. If any of the icing has crusted, it cannot be used.

NOTE: Because of health concerns about eating raw eggs, be sure to use either pasteurized meringue powder or egg white powder for the uncooked icing. Meringue powder and egg white powder are available in select supermarkets, gourmet shops, and health-food stores. 

OUTLINE CONSISTENCY: Generally, the consistency that you'll obtain following these proportions is thick enough to outline cookies:  

To make Royal Icing in outline consistency:
bullet5 tablespoons meringue powder
bullet1 pound sifted confectioners' sugar
bulletScant 1/2-cup lukewarm water
bullet1 teaspoon flavoring like vanilla, lemon, orange, almond or cherry (optional - Note: will color icing. Clear vanilla will not)

Combine all ingredients. This is mixed with the paddle attachment on an electric mixer for about ten minutes on high speed.

ROYAL ICING CAN BE THINNED OR THICKENED: A thinner icing (with more water) is best for flooding, since it spreads more smoothly; a thicker icing (with more sugar) is best for piping.  When glazing and piping, divide the icing in half. One portion can be thickened and the other one thinned. 

To Make Royal Icing for delicate flowers with thin-petals:

ADD IN ORDER GIVEN: Beat until meringue powder is thoroughly dissolved, (It will begin to froth like egg whites)
 

bullet5 - 6 tablespoons hot water
bullet3 tablespoons meringue powder
bullet1 teaspoon vanilla

THEN SLOWLY ADD:

bullet1 pound confectioner's sugar...or less if its already thick enough

*You do not have to add all the confectioners sugar if icing is getting too thick. At first, expect it to be soupy. Beat until the icing thickens. Watch for it to lose it's shine and stand in peaks. It takes less time if you have a heavy duty mixer. Maybe about 10 minutes. 15 minutes with a hand mixer.

Flooding consistency: “Flooding”, also known as "Run sugar", "Floodwork", and "Color flow" or "Icing Runout", refers to the process of filling in a thicker Royal icing outline with a thinner consistency. It can be used to fill in detailed designs, such as logos, plaques, panels, and collars can be made for decorating cakes. Use a fine-tipped paintbrush or a pastry bag to apply. Let it dry thoroughly. You can decorate on top of this base with a thicker Royal icing with a pasty bag fitted with a writing tip.  

The consistency of Royal Icing can be adjusted to make a flooding consistency by:
bulletMake a batch of Royal Icing in outline consistency.
bulletAdd more water. The way I check for the proper consistency is to add either a tablespoon at a time until you can lift the paddle and see the icing dissolve into itself by the count of three. 

Stiff consistency: This is used for piping outlines and sticking decorations onto cakes.  It dries very hard and holds a line or shape when piped.

Stiff Royal Icing is made by: 

bullet

1 large egg white (NOTE: If being consumed, for safety, use pasteurized egg whites or meringue powder equivalent to 1 large egg white plus water to reconstitute, as specified on its container.)

bullet

1-1/2 cups confectioner's sugar, sifted.

Whisk the egg white in a large bowl with a fork.  Add a quarter of the confectioners' sugar and beat well. Gradually work in the remaining confectioner's sugar, beating well between each addition until the mixture holds its shape. 

Glaze consistency:

To make a glaze suitable for a base coat:
bulletThin slightly with water, a drop at a time, and stir until its consistency is that of sour cream or thinner.  

When using a pastry bag: 

bullet

To fill a pastry bag, place the bag tip side down in a glass about 3 inches shorter than it; fold the top of the bag down over the edge of the glass to form a cuff. Using a large rubber spatula, scrape the icing into the bag, filing it to one-half to two-thirds full. Unfold cuff, and close bag with a twist tie.

bullet

To prevent the pastry bag tip from clogging, either place a damp paper towel in the bottom of the drinking glass, or insert a toothpick in the tip, and remove it just before piping.

Frosting an Entire Cake with Royal Icing: (FOR COOKIES)

Two coats are absolutely necessary when using Royal Icing as a frosting. A third is recommended or until a satisfactory finish is obtained. To start, gather the following equipment:

bulletA turn table
bulletA straight edge or ruler with a sharp edge
bulletA palette knife
bulletA side scraper
bulletA sharp knife
bulletPlastic wrap
bulletA soft brush
bulletA batch of Royal Icing that is not too stiff or runny. Keep covered at all times.
bulletA batch or marzipan to cover cake with

Since Royal Icing dries candy-hard, it is not recommended for icing your cakes, but it can be done. If the icing is made not too stiff or too sloppy it will work better, but it still dries harder than other cake icings, unless you add 1 teaspoon of glycerin which softens it. Before using, have it in a suitable bowl and ready to use. Keep Royal Icing not using, covered at all times.

1) Make sure the cake is previously covered with marzipan. Place covered cake in the middle of a turn table secured with a dollop of Royal Icing.

ROYAL ICING - HOW MUCH DO I NEED TO COVER A CAKE ? A guide for average height cakes. Vary the amounts to suit your cake or taste.

Cake Size Pounds Kilogram
6"   500g
7"   1.5  750g
8"   1kg
9"   2.5  1kg 250g
10"   1kg 500g
11"   3.5  1kg 750g
12"   2kg

2) Using a palette knife, put a large dollop of Royal Icing onto the top of the cake. Do not do the sides, yet.

3) For the top, spread the icing, using a backwards and forwards movement (paddle), turning the cake on the turntable as you go. This movement displaces any unwanted air bubbles from the icing. At this point don't worry about any icing spilling over the edges. Keep the palette knife clean.

4) Holding the straight edge at both ends, at a 45 degree angle on the surface, draw it across the top of the cake towards your body in one continuous movement, making sure not to press down too hard.  Return any icing collected on the straight edge back to the bowl. If this coat is not level, scrape off and start again. You can do this as many times as you like, for about 5 minutes, as long as the icing is still wet and not crusting. Clean the straight edge after each attempt.

5) Using the palette knife, remove any icing from the sides of the cake. Don't return it to the bowl if it has become crusty. 

Paste coloring used in Royal Icing decorations will turn out to be more pastel than in Buttercream ones. For more vibrant colors, use more paste color. Liquid colors will also change it's texture to be a little more fluid. 

6) Leave on the turntable in a cool room for the top to harden. It should be dry enough after two hours to be able to frost the sides.  

Use Royal icing as a "glue" to stick decorations on a cake with. For example, place a mound of Royal Icing on the frosted cake where you want to decoration to be. Immediately press it lightly into place. 

7) Using the palette knife spread icing onto the sides. Paddle the icing as before turning the cake as you go. (see 3) Clean the knife. NOTE: If you are icing a square cake the sides are coated individually

8) Hold the scraper at a slight angle (about 15 degrees) against the cake side, with your other hand take hold of the board/turntable at the back of the cake near the scraper. Slowly, but without stopping, revolve the cake until a circle has been completed. When the entire surface is smooth, lift the scraper away from the side. This will leave a take-off mark which initially will be very pronounced. With practice and after further coats of icing this mark will be less noticeable. If you are unhappy with your first attempt then re-paddle and have another go. When finished clean the scraper.

10) Using the palette knife, remove any surplus icing which has crept over the top edge of the cake. Do not return this icing to the bowl it will have dry icing in it. Clean off any icing left on the board and clean the palette knife.

11) Leave the cake in a dry room to harden overnight then start all over again the next day. Store the remaining icing in an airtight container for later use. ....don't despair though a little practice and you soon get your icing legs.

12) Before adding the second layer of icing make sure the first one is dry. Remove any rough edges and the take-off line with the aid of the sharp knife. Use the soft brush to remove any loose particles of icing which could spoil the next coat of icing. The icing used for the second covering should be slightly softer than the first. Icing from the previous day should be of the correct consistency needed, it will need a stir before use though.

13) The third or final coat of icing, softer still than the previous coats, is applied. Make it about the consistency of slightly whipped cream. The final coat is applied in exactly the same way as before, but with a little more pressure added when using the straight edge and the side scraper. Most of the icing is taken off the cake, leaving a thin, smooth film of icing underneath. 

14) When using Royal Icing with decorations, add decorations immediately after frosting, before the frosting "sets," so decorations can adhere to icing.

adapted from pastrywiz.com

Storing Royal Icing:

Decorations made with royal icing will last indefinitely if not subjected to condensation. If humidity is inevitable, prepare royal icing with pure confectioners' sugar, add less liquid and add 1 extra teaspoon of meringue powder to the recipe.

Cakes decorated completely with dry royal icing decorations should be stored according to the icing that has been used to cover the cake. If refrigerated, afterwards put the cake in a very well air-conditioned room for about 1 hour in its wrappers. This will dry up any condensation on the surface.

However, if royal icing decorations are to be placed on a cake that will be frozen, place decorations on the cake after it has thawed and reached room temperature, so the colors do not bleed from condensation. If you are storing an already decorated cake, and can't take off all the decorations without ruining it, store accordingly. After freezing, let cake thaw in its wrappers, preferably in an air-conditioned room. This will dry up any condensation on the surface. It will take about 3 to 6 hours to thaw, depending upon the cake.

If you are making royal icing to be piped, and have left-overs, make sure you keep it covered, airtight at room temperature, if made with meringue powder OR raw egg whites (the sugar in the recipe acts as a preservative; however, royal icing made with raw eggs whites is non-edible, anyway). If any of the Royal Icing has crusted during storage, it cannot be used.

It will keep for about a week or two. Cover icing with a damp kitchen towel (not a paper towel because it dries too quickly) and then with plastic wrap. Secure with a rubber band and then cover with an airtight covering. Stir thoroughly before using. But, sometimes when it's humid, Royal Icing does not store well at all.

If any of the Royal Icing has crusted (gets a thin crust of hardened sugar) during storage, it cannot be used.

If the Royal Icing is too stiff after storing, rebeat with an electric mixer at low speed first. I've noticed that mixing thin icing for several minutes after storing tends to thicken it up, so add more water, if necessary, a drop at a time, to thin it.

From Kelley, professional cake decorator, posted on the Ask Sarah Board for Bakers:

Here are the two recipes I use for royal icing. One with egg whites and one using meringue powder. More Recipes.

NON-EDIBLE Egg White Royal Icing Recipe
This is the icing I use when doing NON-EDIBLE decorations!! Gingerbread houses, icing flowers that don't touch the cake, etc. It's cheap and easy to make and dries rock hard. It will last forever once dry, as long as it doesn't get wet.

Make sure the beater blade and bowl are completely grease free! Any grease will ruin the icing.

3 large egg whites
1/2 tsp. cream of tarter
1 pound (4 cups) of powdered sugar (sifted)

Beat the egg whites until a medium stiff consistency. Add the cream of tarter and powdered sugar cup by cup. Add until the icing is firm enough so that when you run a knife through it leaves an impression.

Store in a grease-free airtight container at room temperature for up to three days. I have actually used it after five and it's still fine to decorate with.

SAFE Meringue Based Royal Icing Recipe
This is the stuff that is edible and safe to use for all decorations, etc... My recipe is exactly the same one Sarah has in her recipe area, except mine if half the amount.

3 tablespoons of meringue powder
1 pound (4 cups) of powdered sugar (sifted)
6 tablespoons of warm water
1/2 teaspoons of extract-- do not use a butter flavored extract because some have enough oil in them to mess up the icing. I use either lemon or orange.

I put the water, extract and meringue powder in my mixture and beat until it's blended. I then add the sugar one cup at a time on low.

Add more sugar if it's too thin, or more water 1/2 tsp. at a time if it's too thick. You want to be able to leave an impression when you run a knife through it.

This icing can be stored for up to two weeks in an air-tight container at room temp.

This icing will also last forever if it remains dry.

Kelley's Royal Icing Tips:

bulletI keep a damp towel over my icing tips when I'm not using the decorator bag. This keeps it from drying up in the tip.
bulletWhen I add color to royal icing I let it rest for several hours or even overnight (in the air-tight container) because color darkens over time. I use only gel-paste food colors, as they give a nice strong color without having to use a ton.
bulletColored royal icing that is frozen will bleed color when it thaws out! If you must freeze or refrigerate anything, let it thaw out to room temp before putting on the colored royal icing.
bulletI personally have never frozen a batch of royal icing. I asked other bakers I know if this can be done and I was told by several that it came out with a grainy texture, and that they had problems getting it to adhere and pull out correctly for string-work.
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