4 tbsp (56g) butter
8oz (230g) semi-sweet chocolate, chopped
1/2 cup white sugar
2 tsp vanilla
1-1/2 cups flour
1/4 tsp salt
1/2 tsp baking powder
powdered sugar for rolling
Melt butter and chocolate together.
Beat eggs and sugar together with an electric mixer until pale, thick, and fluffy (about 3-5 minutes). Add the vanilla. Combine with the chocolate.
Whisk together flour, salt, and baking powder. Add to chocolate mixture and mix until combined.
Chill for several hours or overnight until it hardens into a dough.
Form balls of about 1 tbsp, roll in powdered sugar (make sure to cover the chocolate dough completely), and place on baking sheets. Bake at 325F (165C) for 8-10 minutes.