Oatmeal Cake with Caramel Icing

My dad's favorite cake. And he's NOT a cake person. He yammers for it incessantly when I ask the family what I should bake. It's SO moist and yummy. Super easy cake. Just mix and bake!

1 cup quick cooking oats
1 1/2 cup boiling water
1 cup sugar
1 cup brown sugar
1/2 cup margarine
2 eggs
1 1/2 cups flour
1 tsp baking soda
1/2 tsp cinnamon
1/2 tsp salt
1 tsp vanilla

Mix the oats and boiling water while preparing the rest of the cake. Cream margarine and the sugars, and mix in the eggs. Sift in dry ingredients, then mix into a creamed mixture. Stir in oatmeal and vanilla. Mix well. Grease and flour a 9x13 pan. Bake for 30 minutes at 350'.

Frost when cool with caramel icing:
1/4 cup butter
1/2 cup brown sugar
1/8 cup milk
1 cup powdered sugar

Melt butter; stir in brown sugar. Bring to a boil and boil for 2 minutes. Stir constantly. Add milk slowly, stirring until mixture boils again. Remove from heat and cool. Add powdered sugar, beating until creamy. Add dashes of hot water if the icing is too stiff (chances are it is.)

Note: make sure the brown sugar doesn't have lumps or else you'll find nasty crunchies in your frosting...