Place all ingredients except icing in a large mixing bowl.
Mix with a hand mixer until well combined.
Spray a 9" loaf pan with non stick spray, and pour batter in, a little under half way.
Bake at 350 degrees for 25 minutes.
Turn oven down to 225 degrees and place cake on top rack.
Bake an additional 20 minutes, or until cake is baked through, and toothpick comes out clean.
Spread icing on top (if desired) and slice.