Baked Chocolate Doughnuts with Peanut Butter Frosting

pkg. Betty Crocker Reese’s Peanut Butter and Chocolate Cupcake Mix

water

canola or vegetable oil

eggs

tblsp. softened butter

tblsp. cream, half and half, or milk

For garnish: mini chocolate chips, white chocolate chips, mini marshmallows, sprinkles, etc.