1 (8 oz.) pkg. Baker's semi-sweet chocolate
1/4 c. melted butter
1 c. chocolate cookie crumbs
1 c. milk
1/4 c. crunchy peanut butter
1 (4-serving size) pkg. Jello Butterscotch Flavor Instant Pudding and Pie Filling
3 1/2 c. (8 oz.) Cool Whip whipped topping, thawed
3/4 c. chopped peanut brittle
3 tbsp. butter