Tri-Level Brownies Recipe

Crust Layer:
1 cup quick-cooking rolled oats
1/2 cup flour
1/2 cup brown sugar
1/4 tsp. baking soda
1/4 tsp. salt
6 tablespoons melted butter
Brownie Layer:
3/4 cup sugar
1/4 cup melted butter
1 ounce unsweetened chocolate, melted then cooled
1 egg
1/2 + 1/8 tsp. baking powder
2/3 cup flour
1/4 tsp. salt
1/4 cup milk
1/2 tsp. vanilla
1/2 cup chopped walnuts
Frosting Layer:
1 ounce unsweetened chocolate
2 tablespoons butter
1 1/2 cup confectioner’s sugar
1 tsp. vanilla
2 tbs hot water
9 Reserved walnut halves