Preheat oven to 350 degrees F. Prepare 9x11 baking pan with cooking spray.
Using an electric mixer, mix all of the cake ingredients together for about 2 minutes or until combined.
Pour batter into pan and bake for 25-30 minutes or until toothpick comes out clean. Let cake cool for at least 10 minutes. This helps the icing not to melt.
In a small bowl, mix together icing ingredients. Drizzle over the cake.
Notes
Try not to over mix the cake batter.
Don't forget to grease your pan either with non-stick spray or shortening.
Make sure to test that the cake is finished baking by using a toothpick and inserting in the middle of cake. If it comes out clean it is done.