1 cup heavy cream
1/4 cup light corn syrup
2 tablespoons butter
2 tablespoons coffee liqueur
1 teaspoon vanilla extract
10 ounces dark chocolate, chopped
One 9-inch prepared chocolate cookie crust, such as Oreo Pie Crust
1 1/2 cups heavy cream
1/4 cup chocolate hazelnut spread, such as Nutella
1 tablespoon instant espresso or coffee
1 tablespoon sugar
2 teaspoons vanilla extract
Chocolate puffed rice cereal, for garnish