Transform your cookies into eye-catching treats with this easy Royal Icing recipe. With three simple ingredients and a splash of colour, it’s ideal for outlining and flooding cookies for any occasion.
Royal icing has been part of my kitchen for years. It’s the glaze that gives biscuits and cakes a smooth, glossy finish and makes them look neatly decorated. I often make it when my girls and I decorate biscuits together. The colours, laughter, and sugar everywhere always make it worth the cleanup.
It’s the same icing I use for my Baby Shower Shortbread Cookies. This version is made with egg whites, a simple choice that saves you from an extra trip to the shops. It dries firm, keeps its shape, and gives every biscuit a clean, smooth coating.
Key Ingredients for Royal Icing
Egg White
Acts as the base of the icing and helps it set firm once dry. It gives the mixture structure and a naturally glossy finish without needing meringue powder.
Icing Sugar
Provides sweetness and thickness. Sifting it first gives a smoother texture, making the icing easy to whip and spread evenly.
Lemon Juice
Adds a light citrus flavour while helping stabilise the egg white. It also keeps the icing bright and fresh-looking.
Find the exact measurements in the recipe card below.
How to Make Easy Royal Icing
Step 1: Lightly beat the egg white.
Step 2: Add the icing sugar and whip it with an electric hand mixer until smooth and pearl-like.
Step 3: Add the lemon juice and keep whipping until completely incorporated.
Frequently Asked Questions
Yes. This recipe uses fresh egg whites instead of meringue powder. It is the traditional method and gives the same smooth, glossy finish without needing any special ingredients.
Drying time depends on the thickness and humidity. Thin layers usually dry in 2 to 3 hours. Thicker decorations can take up to 6 hours or overnight to set completely.
Yes. Both gel and liquid food colourings work well. Gel colouring is stronger so you can use less and it will not thin the icing.
For a glossy finish, let the icing dry in a cool and dry area. If your kitchen is humid, place the decorated biscuits in front of a fan to help them set faster. Mix the icing gently to avoid adding too much air, which can make the surface dull.
Extra Help from the Kitchen
Use a Clean, Dry Bowl – Any trace of grease or moisture can prevent the icing from whipping properly. Make sure all equipment is spotless before you start.
Separate the Eggs While Cold – Cold eggs are easier to separate, but egg whites whip better when closer to room temperature. Separate them in advance if you can.
Whip at a Steady Speed – Start on low speed to let the proteins in the egg whites relax, then increase slightly for better volume and elasticity.
Adjust Consistency Carefully – If the icing begins to harden, stir in a drop or two of water until smooth again. Be cautious not to thin it too much or it may form air bubbles.
Keep Icing Covered Between Uses – Royal icing dries fast. Place a damp cloth over the bowl while you work to stop the surface from forming a crust.
Variations and Twists
Add Lemon Zest for a Fresh Flavour – Finely grate lemon zest into the icing for extra brightness and a hint of citrus.
Make Chocolate Royal Icing – Mix in 1 tablespoon of unsweetened cocoa powder to create a soft chocolate version perfect for biscuits and cakes.
Try Almond-Flavoured Icing – Add a few drops of almond extract for a subtle nutty twist that pairs well with shortbread or butter biscuits.
Tint with Gel Colours – Divide the icing into bowls and tint each one with different gel colours for fun, vibrant designs.
Storage and Shelf Life
Store any leftover royal icing in an airtight container with a piece of plastic wrap pressed directly onto the surface. Keep it in the fridge for up to 3 days. When ready to use, bring it to room temperature and stir gently to restore its smooth texture.
Decorated biscuits can be stored at room temperature in a single layer inside an airtight container for up to 1 week. Keep them in a cool, dry place away from humidity to maintain the icing’s firm finish.
Freezing is not recommended, as the texture of royal icing can separate once thawed.
Delicious Ways to Use Royal Icing
Easy Royal Icing Recipe
Transform your cookies into eye-catching treats with this easy Royal Icing recipe. With three simple ingredients and a splash of colour, it’s ideal for outlining and flooding cookies for any occasion.
Ingredients
- 1 egg white
- 300 g – 10.5 oz icing sugar
- 2 tbsp lemon juice
Instructions
-
Lightly beat the egg white.
-
Add the icing sugar and whip it with an electric hand mixer until smooth and pearl-like.
-
Add the lemon juice and keep whipping until completely incorporated.
Recipe Notes
- To thin it down a little for flooding cookies, add a small amount of water, about 1 teaspoon at a time, until you reach the desired consistency.
- If you want a coloured icing, add a few drops of liquid food colouring.
Hi Manu,
This recipe is linked to your baby shower shortbread cookies. A pregnant woman should avoid raw egg due to the risk of salmonella. What substitute can be made for the egg white in this icing recipe?
Hi Erika!
You can use pasteurized egg whites in the same amount,
or swap with 2 tbsp meringue powder mixed with 2 to 3 tbsp water. Both are safe and give a similar result.