Perfect for ice cream sandwiches
1 cup flour
1/3 cup cocoa
1/2 tsp baking powder
1/4 tsp hot cocoa mix
1/4 tsp salt
1/2 cup unsalted butter, softened
3/4 cup brown sugar
1 tsp vanilla
Preheat oven to 350 F. Grease 2 baking sheets. Sift first 5 ingredients into a bowl. Reserve.
Cream butter and sugar with mixer until light and fluffy. Add egg and vanilla, mix well. Add dry ingredients, mix until just combined.
Form 1/4 cup portions of dough into 8 balls. Put 4 balls on each sheet, flatten with spatula. Bake about 10 minutes. Let stand 2 minutes before removing to wire rack to cool completely.