Step 1

Preheat your oven to 350°F.

Step 2

Generously grease a 9×13 baking pan with baking spray.

Step 3

Combine pumpkin puree, heavy cream, sugar, spices, and eggs.

Step 4

Mix until the mixture is smooth and lump-free.

Step 5

Pour the pumpkin mixture into the greased 9×13 baking dish.

Step 6

Whisk together cake mix and graham cracker crumbs.

Step 7

Sprinkle cake mix evenly over the pumpkin mixture layer.

Step 8

Add chopped pecans over the cake mix layer.

Step 9

Drizzle melted butter over the pecans.

Step 10

Bake for 50-60 minutes until golden brown.

Step 11

Cover with foil if browning too quickly.

Step 12

Insert a skewer; it should come out clean.

Step 13

Cool completely in the pan on a wire rack.

Step 14

Refrigerate for at least 4 hours or overnight.

Step 15

Top each slice with whipped cream before serving.