2 cups flour
2 tbsp cocoa powder
3/4 cup softened butter
3/4 cup icing sugar
1/3 cup brown sugar
1 tsp vanilla
Mix butter, sugars and vanilla in a bowl until fluffy. Add flour and cocoa powder. Roll into a log and refrigerate until butter hardens. Cut slices from log and bake in 325 degree oven for 20 to 30 minutes.