In a medium bowl, beat together ¼ cup cold water and meringue powder with a mixer at medium speed until foamy. Gradually add confectioners’ sugar, beating until smooth. (Frosting will be thick.)
Transfer two-thirds of frosting to another medium bowl. Cover with plastic wrap directly on surface until ready to use.
Transfer remaining one-third of frosting to a small bowl. Add desired amount of food coloring and vanilla extract, stirring until incorporated. Cover with plastic wrap directly on surface until ready to use.
Recipe by TeaTime Magazine at https://teatimemagazine.com/santa-blondies-recipe/