1 1/2 c. flour
1/2 c. (1 stick) butter
1 2/3 c. (10 oz. pkg) Peanut Butter chips, divided
1 can (14 oz.) sweetened condensed milk (not evaporated)
1 egg slightly beaten
1 tsp. vanilla
3/4 c. chopped nuts

Stir together flour & brown sugar; cut in cold butter until mixture is crumbly. Stir in 1/2 cup peanut butter chips. Press mixture on bottom of greased 12 x 9 baking pan.

Bake 15 minutes at 350°F. Meanwhile combine condensed milk, egg and vanilla; stir in remaining chips and nuts. Spread evenly over baked crust.

Bake 35 minutes at 350°F. Cool completely in pan. Cut in squares.