Heating oven to 180 C. Put in a fireproof container candy, the butter and milk. Put on low heat and stirring constantly until complete dissolution of the sweets. Leave aside to cool. In bowl, beat eggs and powdered sugar. Add flour and baking powder. Mix until a smooth mixture. Add candy mixture and mix gently. Pour in shapes for muffins or cake pan. Bake 20-25 minutes for muffins, cake for 40 minutes. Waiting for the cake to cool completely before removing from the mold.