Make the royal icing: In a large bowl, beat the egg whites and cream of tartar with an electric hand mixer until frothy. Gradually add the powdered sugar, 1 cup (120 grams) at a time, until the ...

If you want to decorate your cookies like ours here, when you’re preparing this icing, use the “6-second pull test” to determine if it is the correct consistency.

Royal icing is a type of icing that uses stabilizers (such as egg whites, meringue powder, or cream of tartar) that allow it to harden, acting as a glue for homemade gingerbread houses.

Royal Icing by Rachel Mrak 1/2 cup warm water. 1/3 cup meringue powder . Mix on high for 1.5 minutes until foamy. Add: 2 tsp lemon juice . 4 tsp flavoring (vanilla, marshmallow, almond, etc) ...