Preheat oven to 350F degrees and coat a donut pan with non stick spray or butter. Set aside.
Add all cake ingredients to a large bowl and mix well until smooth and color is even.
Divide and pour batter into prepared pan and bake for 13-15 minutes until a toothpick comes out clean when poked through the center of each donut. Remove from oven and let cool.
Prepare topping by adding frosting ingredients to a small bowl. Whip on high until smooth. Add extra heavy cream for a looser icing if desired.