– 2 1/4 c. Old Fashioned oatmeal – 2 1/4 c. flour – 1 1/2 c. brown sugar – 1 c. butter (2 sticks) – 1 1/2 tsp. baking soda – 1/2 tsp. salt – 3 c. fresh or frozen blueberries – 1/4 c. sugar – 1 Tbsp. corn starch
Press 2/3 of the oatmeal mixture into a 9x13 pan, saving the other 1/3 for the topping.