The chocolate peanut butter oatmeal marble bars recipe has a robust oat flavor, combined with great favorite’s peanut butter and chocolate and its an instant hit!   Ingredients 1 stick (1/2 cup) salted butter, softened 1/3 cup granulated sugar 1/3 cup packed brown sugar 1 teaspoon vanilla extract 1 egg 3/4 cup all-purpose flour 1/2 […]