No bake fancy-looking “marble” cookies

Ingredients:
Approx. 25 plain vanilla cookies, broken in tiny pieces (vanilla wafers, animal crackers, etc.)
1/2 cup butter
1/2 cup cocoa powder
1 cup confectioner’s sugar
1 egg
1 tsp. vanilla

Mix all ingredients, except cookies, in a saucepan over low heat, stirring continuously. When begins to boil, stir until mixed. Remove from heat. Add cookie pieces, stir until mixed. Let cool slightly
Spoon mixture onto a sheet of wax paper or aluminum foil. Shape into log. When frozen (or almost), remove covering and slice into cookies!