Combine flour and baking powder in a bowl and stir until the baking powder is mixed into the flour.
Cream together the sugar and butter. Add eggs, vanilla, and cocoa powder. Mix until combined.
Add flour mixture and mix until combined. Chill dough for > 4 hours and up to a week. Remove from fridge 30 minutes prior to baking. Preheat oven to 350 when you remove the dough from the fridge.
Dust counter with cocoa powder and roll out cookies to 1/4 inch thickness. Cut out into cute shapes, transfer to a parchment lined baking sheet. Bake for 8 minutes. Remove from oven and cool on a wire rack. Drizzle with white chocolate baking melts.