1 (19 ounce) can or bottle peanut butter
1 (3 ounce) package instant vanilla pudding mix
Preheat oven to 350 degrees F (175 degrees C).
Place peanut butter mixture in a large glass bowl, and beat until smooth. Stir in vanilla pudding. Pour into the jelly-filled pie pan.
Bake in preheated oven for 45 minutes, or until a toothpick inserted into the center of the pie comes out clean. Cool before cutting into squares.