1. Combine crushed cookies and melted margarine and press in 9x13 dish. 2. Chill 1 hour in refrigerator. 3. In a saucepan over medium heat, combine confectioners sugar, evaporated milk, chocolate chips and 1/2 cup of margarine. 4. Bring to a boil and stir constantly for 8 minute. 5. Remove from heat and stir with vanilla. Set aside to cool. 6. Slice ice cream into 3/4 inch slices and place them in a single layer on top of the crust. 7. Sprinkle the peanut butter chips on the slices. 8. Place in fridge for 8 hours or overnight.
