Peanut Butter, Chocolate, and Banana Cheesecake

Peanut Butter, Chocolate, and Banana Cheesecake
Crust:
1 1/2 cups graham cracker crumbs
1/2 cup melted butter
Filling:
1 cup creamy peanut butter
1 cup powdered sugar
2 ripe bananas, mashed
2 packages (226 g each) cream cheese, softened
1 cup heavy cream
1/2 cup granulated sugar
1 teaspoon vanilla extract
Topping:
4 oz (115 g) dark chocolate, melted
2 tablespoons milk
Instructions:
Prepare the crust: