German Chocolate Bombs Ingredients For the cake Cooking spray 4 oz. unsweetened chocolate, chopped (about 1 cup) 1 oz. (1/4 cup) natural cocoa powder 1-1/2 cups boiling water 7 oz. (1-1/2 cups) unbleached all-purpose flour 1 tsp. baking soda 1/4 tsp. kosher salt 1-1/2 cups packed dark brown sugar 8 oz. (1 cup) unsalted