Preparing and baking yellow cake

So I decided to bake a yellow cake. I know doesen't sound to exciting but it was in the book. I did however make a chocolate ganache to put in the middle and a creamy chocolate frosting to frost it with. So I actually did three things out of the book. Heee!! The cake was easy to make the ganashe wasn't too hard but I messed up on the fosting. I was suppose to heat the heavy cream to 180 degrees, remove from heat and then add the chips and put it in a bowl of ice water and stir until cool. I forgot the first step I mixed the heavy cream and the chocolate all once so I had to modify.