CakeyTops
FrostingsEasy

Royal Icing for Cookies and Cake Decorating

One royal icing base, three working consistencies. Stiff for piping borders, medium for outlines, thin for flooding — all from a single batch with a few drops of water.

Prep
10 min
Bake
0 min
Serves
24 decorated biscuits
Difficulty
Easy

Method

  1. 1

    Wipe the bowl of your stand mixer and the paddle attachment with a little white vinegar or lemon juice on kitchen paper. Any trace of fat will stop the icing whipping up properly.

  2. 2

    Place the egg whites in the bowl and whisk briefly by hand to break them up — you do not want foam, just to slacken the whites.

  3. 3

    With the paddle attachment on the lowest speed, add the icing sugar a heaped tablespoon at a time, letting each addition disappear before adding the next. Going slowly here keeps the kitchen — and you — clean.

  4. 4

    Add the lemon juice and glycerin if using. Increase the speed to medium and beat for 4–6 minutes, scraping down the bowl once or twice, until the icing turns brilliant white and forms stiff peaks that hold their shape when you lift the paddle. This is "stiff" consistency, your starting point.

    Beat to stiff peaks05:00
  5. 5

    Divide the icing into bowls — one for each colour or consistency you need. Cover any icing you are not actively using with a damp clean cloth pressed to the surface; royal icing forms a crust within minutes.

  6. 6

    Adjust to working consistency by adding water a quarter-teaspoon at a time, stirring gently. Stiff (as-mixed) for piped borders and detail. Medium / outline (a peak that flops over slowly when lifted) for outlining cookies. Flood (a ribbon that disappears back into itself in 15–20 seconds) for filling cookies.

Baker's Notes

  • •Egg white safety: in the UK, fresh British Lion-stamped eggs are pasteurised and considered safe to use raw. If you would rather avoid raw eggs, swap to meringue powder: 2 tablespoons hydrated in 60ml warm water gives the equivalent of 3 medium egg whites. Carton pasteurised egg whites also work — use 90g.
  • •The 15-second flood test: drop a spoonful of icing back into the bowl. If the surface smooths out in 15–20 seconds, you have flood consistency. Less than 10 seconds — too thin, beat in a tablespoon of fresh sifted icing sugar. More than 30 seconds — too thick, add half a teaspoon of water.
  • •Why glycerin? Pure royal icing dries rock-hard, which is right for cake decorations meant to last but unpleasant to bite into on a cookie. Half a teaspoon of glycerin keeps it crisp on the surface but yielding underneath. Skip it for decorations you will store and reuse.
  • •Drying time: cookies set firm to the touch in 1 hour and fully through in 8–12 hours at room temperature. Stack only when fully dry — pressing too early leaves dents.
  • •Storage: cover the surface with cling film pressed flush and refrigerate for up to 1 week. Re-whip briefly before use; you may need to add a few drops of water.
  • •Pairs perfectly with: decorated sugar cookies. The cookie cutter generator on cakeytops.co.uk can turn any photo into a custom cookie cutter outline if you want a shape no shop sells.
Recommended Supply

Colour your royal icing

Royal icing takes colour beautifully, but liquid colour thins the flood consistency you just dialled in. Concentrated gel keeps the ratio intact — a dab per bowl is enough for vivid, even colour.

Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases.
Used in our kitchenDecorating supplies

Sugarflair Rainbow Gel Food Colours (Set of 6)

Six concentrated gel food colours for buttercream, royal icing, sugarpaste, and cookie painting.

Sugarflair is a UK decorating staple. This six-colour starter set is highly concentrated, so a cocktail-stick dab goes a long way, and the colours deepen as they dry — which is exactly what you want for strong buttercream tones and deep PYO palette colours that still read after a wet brush.

Why we recommend it

The set we would point a new decorator to before they commit to forty individual pots — enough to mix most shades you actually need.

  • Colouring buttercream, royal icing, and sugarpaste
  • Mixing custom shades from a small core set
  • Deep colours for paint-your-own palettes
Amazon product reference: B00K5SUR50
View on Amazon

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Published 2 May 2026·Bo