It gets more moist and tastes better if you make the cake on the day before, wrap with plastic wrap and store at room temperature overnight. For heart shape dusting, draw a big heart on a piece of parchment paper using a pencil and cut the heart out. Place the heart in the center of the baked cake and dust cocoa powder around it. Discard the heart paper and place the remaining paper on the cake aligning with the heart shape. Dust powdered sugar to create a white heart in the center.