No Bake Frozen Chocolate Raspberry Pie

For the crust

whole (227 grams) chocolate graham crackers

unsalted butter, melted

For the filling

semisweet chocolate chips

raspberries, fresh or thawed frozen

granulated sugar

unsweetened cocoa powder

plain nonfat yogurt, cold

cream cheese, at room temperature

powdered sugar

heavy cream, cold

For topping

semisweet chocolate chips, melted

Fresh raspberries, for garnish