Preheat the oven to 350 degrees. Grease and flour an 8x8-inch pan.
Mix the oatmeal with the boiling water and stir. Cover and set aside for a few minutes.
Mix the remaining ingredients, then stir in the oatmeal mixture.
Pour the batter into the pan and bake 23-25 minutes, or until a tester inserted in the center comes out clean.
Combine all ingredients and mix thoroughly.
Spread the frosting over the top of the cake.
Place under the broiler in the oven until the coconut is just browned. Watch very closely–it doesn’t take long.
Cool, slice, and serve. Enjoy.
