1 (12 oz.) box vanilla wafers
2 tbsp. melted butter
1 lb. cream cheese
1 1/2 c. sugar
2 tsp. fresh lemon juice
1 c. sour cream
1/2 c. sugar
1/2 c. sugar
5 eggs
1/2 c. sour cream
1 (6 oz.) jar creamy peanut butter
3/4 to 1 c. chocolate chips
3/4 c. melted chocolate chips

CRUST: Preheat oven to 350 degrees. Butter bottom and sides of 9-inch springform pan. Combine crushed wafers, sugar and butter. Press into bottom of pan.

FILLING: Combine all ingredients except chocolate chips and blend well. Add chocolate chips. Spread filling in crust. Bake until center of filling is firm, 70-80 minutes. Let stand at room temperature 15 minutes before adding topping.

TOPPING: Blend all ingredients. Spread over cheesecake. Bake 10 minutes. Let cake cool, then refrigerate at least 3 hours before serving.