2 cups graham cracker crumbs (from 14 graham crackers) 2 tablespoons granulated sugar ½ cup (1 stick) unsalted butter, melted
Filling
1 .25-ounce envelope unflavored gelatin 1 8-ounce bar cream cheese, at room temperature 1 15-ounce can pumpkin puree 1 cup sour cream ¾ cup granulated sugar 2 teaspoons pumpkin pie spice 1 teaspoon pure vanilla extract
