• 1 (15.25 ounce) package yellow cake mix, divided
  •  cup unsalted butter, melted
  • 1 large egg


  • 1 (29 ounce) can pumpkin puree
  • 3 large eggs
  •  cup milk
  • ½ cup brown sugar
  • 2 tablespoons pumpkin pie spice


  • ½ cup white sugar
  • ¼ cup cold unsalted butter, cubed
  • ¾ cup chopped walnuts


  1. Gather all ingredients.


  2. Preheat the oven to 350 degrees F (175 degrees C). Lightly grease a 9×13-inch baking dish.

  3. Make crust: Transfer 1 cup cake mix to a small bowl; set aside for topping. Place remaining cake mix in a medium bowl with melted butter and egg; mix until well blended.

  4. Spread mixture into the bottom of the prepared baking dish.

  5. Make filling: Combine pumpkin puree, eggs, milk, brown sugar, and pumpkin pie spice in a large bowl; mix well and pour over crust.

  6. Make topping: Add white sugar and cubed butter to reserved cake mix; use a pastry blender to mix until mixture resembles coarse crumbs.

  7. Sprinkle over pumpkin filling, then scatter chopped walnuts over the top.

  8. Bake in the preheated oven until the top is golden brown, 45 to 50 minutes.