Make the graham cracker pie crust: Combine graham cracker crumbles, melted butter, sugar and cinnamon. in small mixing bowl. Stir to combine until the crumbs are well coated with the butter.
Grease a 9-inch deep-dish pie plate. Press graham cracker mixture into bottom and sides of pie pan using bottom of measuring cup or small glass.
Bake the pie crust for 10 minutes and remove from oven. Allow to cool completely before adding the filling.
Make the filling: In a medium bowl, add remaining ingredients and whip to combine with a whisk. You can also use an electric mixer with a whisk attachment.
Pour pumpkin pie filling into cooled graham crust, and smooth even with a rubber spatula.
Bake the Pie: Bake pumpkin pie for 40 minutes.
Pull out of oven and loosely tent with aluminum foil, then bake for an additional 20 minutes. This will help keep edges of the pie crust from browning too much.
Cool and Serve: Pull from oven when the center of the pie is set and place on a wire rack. Let the pie cool at room temperature for 2 hours before slicing.
Serve with whipped cream.
Notes
Use a store-bought graham cracker crust to save time!If you have pre-mixed pumpkin pie spice on hand, you can substitute it for the cinnamon, ginger, nutmeg, allspice and cloves. You'll need roughly 4 teaspoons.