Icing
I haven't actually used this particular recipe, but I found one that says it can be painted on. It calls for: 5 cups powdered sugar, 1/2 cup plus 1 tblsp milk, and paste food coloring. (You could probably add some lemon juice in place of some of the milk, to cut the sweetness and get the flavor you remember.) To make icing, beat together the sugar and milk until smooth. Divide into bowls and add the food coloring. cover with plastic wrap to keep from hardening. Spread on cookies and allow to harden. This recipe should ice 2-3 dozen cookies, depending on size.
Jaymie