Preheat oven to 350°
Combine flour, sugar & beaten egg. Cut in butter until crumbly. Stir in peanuts. Reserve 2 C. crumb mixture. Press remaining mixture on bottom of 13x9 pan. Bake 15 minutes or until lightly browned.
With mixer, beat sweetened condensed milk with peanut butter & vanilla. Spread over prepared crust; top with reserved crumb mix. Bake 25 minutes longer or until lightly browned.
Cool & cut into bars. Store covered at room temperature
Recipe submitted by florentine on 10/8/98