Preheat oven to 350°.Mix together crust ingredients and press into 9-inch pie plate. Bake for 16-17 minutes. Cool. **You can cool it in the refrigerator to speed up the process. For Layer 1, use beaters to mix the cream cheese, powdered sugar and milk. Spread on the bottom of cooled pie crust.
For Layer 2, Mix all dry ingredients together. Whisk together milk and egg yolks in a medium sauce pan.
Whisk the dry ingredients into the milk mixture and cook and stir over medium-high heat until mixture bubbles and thickens, about 5-7 minutes. Watch carefully: Pudding can thicken VERY suddenly.
Remove from heat and stir in butter and vanilla. Spread in flat pan and cover with cling wrap, pressing right against the pudding to prevent a skin forming. Refrigerate 20-30 minutes.
Whisk the cooled pudding and spread on top of cream cheese layer. Cover with cling wrap and refrigerate for 2 hours.
For whipped topping, whip the heavy cream with a hand mixer until fairly firm peaks are formed. Whip in powdered sugar and vanilla. Spread over chocolate layer.
Top with chopped Symphony bar.