Cake
1 1/2 cups boiling water
1 cup old-fashioned oatmeal
1 cup brown sugar
1 cup granulated sugar
1/2 cup butter, cut into pieces
2 eggs
1/2 teaspoon salt
1 teaspoon baking soda
1 teaspoon cinnamon
1 1/2 cups flour

Grease a 13 x 9-inch baking pan. Pour boiling water over oatmeal and let stand 10 minutes. Preheat oven to 350 degrees F.

Cream sugars and butter until smooth, 1 to 2 minutes. Add eggs, then soaked oatmeal and remaining dry ingredients. Pour into prepared pan. Bake about 40 to 45 minutes.

Icing
1/2 cup butter
1/2 cup brown sugar
1/2 cup cream, evaporated milk or half-and-half
1 cup shredded coconut
1 teaspoon vanilla extract

Melt butter in a saucepan, then mix in remaining ingredients. Spread on cake when it's still warm from the oven. Slip frosted cake under broiler for a few minutes to get the topping bubbly and brown.