Pumpkin Pie Squares Recipe

Preheat oven to 350 °. Combine flour, oats and brown sugar. Cut in butter until mixture is crumbly. Press into a greased 13x9-in. pan. Bake until golden brown, about 20 minutes. Meanwhile, beat filling ingredients until smooth; pour over crust. Bake 45 minutes. Combine topping ingredients; sprinkle over filling. Bake until a knife inserted in the center comes out clean, 15-20 minutes longer. Cool, then refrigerate until serving. If desired, serve with whipped cream.