[ Prep Time: 20 Minutes | Start to Finish: 3 Hours | 8 servings ]
In small bowl, stir together cereal and melted butter. Press in bottom and up side of ungreased 9-inch pie plate. Refrigerate until set, about 30 minutes. Heat oven to 350°F. Bake crust 15 minutes. Sprinkle with one-third of the chopped chocolate.
Meanwhile, in large heatproof bowl, mix cocoa and remaining chopped chocolate; set aside. In 1-quart saucepan, heat half-and-half over medium-high heat until almost boiling.
In medium heatproof bowl, beat sugar, egg and egg yolks with whisk until pale yellow. Slowly beat in half of the hot half-and-half, then stir egg mixture back into remaining half-and-half in saucepan. Reduce heat to medium. Heat mixture just to boiling. Cook, beating with whisk, about 1 minute or until thickened. Pour through sieve into reserved cocoa mixture; beat with whisk until smooth. Pour into crust; refrigerate 30 minutes.
Wipe out saucepan with paper towel. Add 6 tablespoons cream to saucepan. Heat to boiling over medium-high heat. Place vanilla baking chips and peanut butter in medium heatproof bowl. Pour hot cream on top and let stand until chocolate is melted, about 2 minutes; beat with whisk until smooth. Spread evenly over chilled pie. Refrigerate until firm, about 1 hour 30 minutes.
To serve, top servings of pie with whipped cream and grated chocolate.
1 Serving: Calories 920; Total Fat 59g (Saturated Fat 34g; Trans Fat 1g); Cholesterol 180mg; Sodium 380mg; Total Carbohydrate 86g (Dietary Fiber 4g); Protein 13g Exchanges: 1 Starch, 4½ Other Carbohydrate, ½ Medium-Fat Meat, 1 High-Fat Meat, 9½ Fat Carbohydrate Choices: 6