Crust:

4 c. oatmeal
1 c. brown sugar
2/3 c. butter, melted
3 tsp. vanilla
1/2 c. dark corn syrup

Topping:

6 oz. chocolate chips
2/3 c. chunky peanut butter

Crust: Mix oatmeal and sugar. Add remaining ingredients; mix well (not topping ingredients). Pat into a buttered 9x13-inch pan.

Bake at 375°F for 12 minutes.

Topping: Melt chocolate chips and chunky peanut butter. Spread over cooled crust.