Preheat oven to 375

Combine flour and sugar in a medium bowl. Cut in butter with pastry blender or 2 knives until mixture resembles coarse crumbs. Press in the bottom of a greased 9x13" pan.

Bake for about 20 minutes or until set but not brown.

Combine flour, walnuts, and brown sugar in same bowl. Cut in butter with pastry blender or 2 knives until the mixture again resembles coarse crumbs.

Spread jam over hot crust. Sprinkle with topping and ½ of the chocolate chips. Bake for 15 top with remaining chips and bake an additional 5 minutes or until golden brown.

Let cool completely before cutting into squares