I made this with the peanut butter cake but had some left over, since I made cupcakes instead of one big cake. I've been eating it on graham crackers and apples and it's still awesome days later. It tastes like a dark chocolate because of the unsweetened chocolate. I melted the chocolate in the microwave (about 2 minutes on high, stirring every 30 seconds) and I beat for more than two minutes to ensure maximum fluffiness, other than that, followed the recipe to a 't'. Love it. Will surely make again.