Name: Pumpkin Oatmeal Dump Cake
Prep time: 10 min
Cook time: 50 min
Total time: 1 h 15 min
Cuisine: American
Ingredients: 1 (15 oz) can pumpkin purée (not pumpkin pie filling); 1 (14 oz) can sweetened condensed milk or 1 (12 oz) can evaporated milk; 2 large eggs; 1/2 cup granulated sugar or brown sugar; 2 tsp pumpkin pie spice; 1 box yellow or spice cake mix (15.25 oz); 3/4 cup old-fashioned rolled oats; 1/2 cup unsalted butter, melted; Optional toppings: chopped pecans, whipped cream, vanilla ice cream

Why You’ll Love This Recipe

This dump cake is incredibly easy to make—just layer the ingredients and bake! No mixers or fancy equipment needed. The pumpkin base is silky and flavorful, while the oat topping adds crunch and heartiness. It’s ideal for feeding a crowd and can be served warm, cold, or even with a scoop of ice cream.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

Canned pumpkin purée (not pumpkin pie filling)
Sweetened condensed milk or evaporated milk
Eggs
Granulated sugar or brown sugar
Pumpkin pie spice
Yellow or spice cake mix
Old-fashioned rolled oats
Unsalted butter (melted)
Optional toppings: chopped pecans, whipped cream, vanilla ice cream

Directions

Preheat oven: Set oven to 350°F (175°C) and grease a 9×13-inch baking dish.
Make the pumpkin base: In a large bowl, whisk together pumpkin purée, eggs, milk, sugar, and pumpkin pie spice until smooth. Pour into the prepared baking dish.
Add the dry mix: Evenly sprinkle the dry cake mix over the pumpkin layer.
Top with oats and butter: Sprinkle oats evenly over the cake mix. Drizzle melted butter across the top, making sure to cover as much as possible.
Bake: Bake for 45–55 minutes, or until the top is golden and the edges are bubbling. Let cool for at least 15 minutes before serving.
Serve: Enjoy warm, room temperature, or chilled—plain or topped with whipped cream or ice cream.

Servings and timing

Servings: 12
Prep Time: 10 minutes
Cook Time: 50 minutes
Cooling Time: 15 minutes
Total Time: 1 hour 15 minutes

Variations

Use a spice cake mix for extra fall flavor.
Add chopped nuts or shredded coconut to the topping for texture.
Use maple syrup in the pumpkin layer for a rich twist.
Swap oats for granola to add crunch and flavor.
Make it dairy-free by using coconut milk and dairy-free butter alternatives.

Storage/Reheating

Store leftovers in the refrigerator in an airtight container for up to 4 days. Reheat individual servings in the microwave for 30–45 seconds. You can also enjoy this cake cold or at room temperature. For longer storage, freeze for up to 2 months and thaw overnight in the fridge.

FAQs

What is a dump cake?

A dump cake is a dessert where ingredients are layered or “dumped” into a pan with little mixing. It’s baked until golden and bubbly, resulting in a soft, cobbler-like texture.

Can I use pumpkin pie filling instead of pumpkin purée?

No, pumpkin pie filling already contains sugar and spices, which will affect the flavor and texture. Stick with pure pumpkin purée.

Can I make this cake gluten-free?

Yes, use a gluten-free cake mix and certified gluten-free oats.

Can I make this dairy-free?

Yes, use a dairy-free milk alternative like coconut milk and a plant-based butter substitute.

Do I have to use oats?

Oats add a lovely texture, but you can omit them or substitute with chopped nuts, crushed graham crackers, or granola.

Why is my topping dry?

Make sure the melted butter is evenly distributed across the surface. Gently pat down dry spots if needed before baking.

Can I make this ahead of time?

Absolutely. This cake holds up well when made a day ahead. Store it covered in the fridge and reheat before serving if desired.

Can I reduce the sugar?

Yes, you can reduce the sugar slightly or use a sugar substitute, but keep in mind that it may alter the texture and sweetness.

Can I add chocolate chips?

Yes! Sprinkle chocolate chips or white chocolate chips over the cake mix before baking for an extra treat.

What’s the best way to serve this cake?

Serve it warm with whipped cream or vanilla ice cream for the ultimate fall dessert experience.

Conclusion

Pumpkin Oatmeal Dump Cake is the ultimate easy dessert for fall—packed with cozy spices, rich pumpkin flavor, and a golden oat topping that’s simply irresistible. Whether you’re baking for a crowd or just want something quick and comforting, this dump cake is guaranteed to become a seasonal favorite.