Preheat oven to 350 degrees F (175 degrees C). Grease your cake pans.
In the bowl of your Kitchen Aid Mixer, cream together the butter and sugar until light and fluffy.
Beat in the eggs one at a time. Beat in the flour alternately with the heavy cream, mixing just until incorporated. Don't over-mix.
Pour batter evenly into prepared baking pans. Bake in the preheated oven for 45-65 minutes, or until a toothpick inserted into the center of the cakes comes out clean. Baking time will be dependent on the size of your pans. For smaller pans, baking time will be decreased so watch carefully and use the toothpick trick! Allow to cool before frosting cake.
For the Champagne Frosting:
Beat butter until light and fluffy in your Kitchen Aid Mixer. Add in powdered sugar one cup at a time alternating with champagne until incorporated. If frosting is too loose, add more powdered sugar. If frosting is too thick, add more champagne.