Sweet Potato Dump Cake

Mashed sweet potatoes are enhanced with a box of cake mix to create this easy Thanksgiving dessert called Sweet Potato Dump Cake.

Serving of tiktok sweet potato dump cake made with seasoned sweet potato mixture baked with a buttery cake mix on top on a stack of white plates with a fork in the background.

Sweet Potato Dump Cake Recipe

A trending recipe with classic fall flavors this Sweet Potato Dump Cake has layers of potatoes with a sweet and crunchy cake topping that is irresistible.

Another one of those super easy recipes that became popular on Titktok, this cake from a box mix lives up to the hype. After making these amazing Cinnamon Rolls with Heavy Cream we’ll try any kitchen hack that people are sharing.

The box of cake mix is the main difference in this recipe and our popular Sweet Potato Soufflé. If you add a layer of chopped pecans it will taste more like our Candied Sweet Potato Casserole.

Tastes so similar to pumpkin pie when pumpkin pie spice. Or give it a different twist by using apple pie spice. The choice is all yours and both options are true winners.

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Close up brown sugar, cinnamon, nutmeg seasoned sweet potato mixture with a crunchy yellow topping of cake mix with butter on top of the dump cake.

This dessert looks like a Sweet Potato Pie when made in round cake pans or more like a traditional cake in a 9 x 13″ pan.

If you share this cake our Sweet Potato Honey Bun Cake or our Pumpkin Pie Cake at the holiday table I believe people will ask for the recipe!

Why This Sweet Potato Pie Dump Cake Recipe Works

  • A crunchy brown topping with butter baked into a cake mix on top of a sweet potato dump cake is delightful.
  • Tastes wonderful served warm with whipped cream.
  • This cake tastes almost like it came straight out of the oven after reheating in the microwave.
  • Can make in two smaller round pans if you have multiple parties to go to.
Serving spoon lifting a scoop of sweet potato dump cake above the pan full resting on a fall colored plaid napkin.

Just like in our Blueberry Crunch Cake a boxed cake mix with butter adds magic to a super quick recipe.

Ingredients Needed

  • Sweet Potatoes – We like to use fresh potatoes, then boil and mash. Canned sweet potatoes can be a substitute.
  • Brown Sugar – Dark brown sugar is popular for a little deeper flavor, but we only keep light brown sugar on hand, so that’s what we use.
  • Granulated Sugar – Another way to sweeten the potato mixture.
  • Butter – Deepens the flavors of the dish when mixed in and melted on top.
  • Milk – The liquid that helps stir them all together to create a smoother mixture.
  • Pumpkin Pie Spice – Gives a pumpkin pie like flavor. Apple pie spice is a great alternative for a different twist.
  • Cinnamon & Nutmeg – Warm, aromatic spice that compliments sweet potatoes so beautifully.
  • Vanilla Extract – Enhances all of the other flavors in the dish.
  • Yellow Cake Mix – Creates a super simple crust for the top of the dump cake.
Ingredients needed to make sweet potato dump cake are three sweet potatoes, white sugar, brown sugar, butter, milk, cinnamon, vanilla extract, pumpkin pie, nutmeg and classic yellow cake mix on a brown wooden counter top.

How To Make A Sweet Potato Dump Cake

Prepare a pot of boiling water.

Wash and peel sweet potatoes then slice into 1/4″ rounds. Gently set potatoes in water.

Once they are fork tender drain and mash well.

Masher in softened sweet potatoes in a white mixing bowl.

Add brown sugar, granulated sugar, half of the butter which is one stick, milk, nutmeg, pumpkin or apple pie spice (one or the other, but not both), cinnamon and vanilla extract.

Brown sugar, cinnamon, nutmeg, pumpkin pie spice, vanilla, milk and sugar poured over top of mashed sweet potatoes in a white mixing bowl with a red spatula laying over the top.

Mix well and spread in the bottom of a greased 9 x 13″ baking dish.

Layer of sweet and spiced sweet potato puree mixtures spread in the bottom of a 9 x 13 pan on a brown counter top.

Sprinkle an entire box of yellow cake mix over top of the potato mixture.

Slices of butter over top of a layer of cake mix in a glass bake dish on a wooden counter top.

Take the second stick of butter and cut into thin slices. Cover as much of the top of the pan as possible.

Set in the oven uncovered to bake.

Spots of butter melted unevenly in sections of a cake mix.

Bake in a preheated 350℉ oven for 30 to 40 minutes.

What If The Top Doesn’t Brown

Check the cake when partially done baking.

If there is still powdery cake mix then add more melted butter to the top to help get an even layer of coverage. This will lead to more uniform baking and browning.

Slices of butter partially melted over top of a layer of cake mix on a dump cake in the oven.

Bake until there is an even layer of crunchy brown topping.

A combination of darker brown and golden brown patches of butter melted beautifully on top of a 9x13 inch dump cake on a fall colored plaid napkin.

Serve warm with some fresh whipped cream or ice cream and enjoy!

Recipe Tips and Tricks

  • Can shred really cold butter for a more even coating on top of the boxed mix than slicing or using pats of butter.
  • A deeper skillet or two round pans with less surface area than a 9 x 13″ pan may mean the cake mix can better absorb the butter topping.
  • During baking if cake mix or flour is visible on top pour or spoon extra melted butter in those spots to help them soften, bake and brown. 
Crunchy brown topping of butter baked into a cake mix on top of a sweet potato dump cake with a fork full on a white plate.

Gingerbread Variation

There are several ways to vary this recipe. One delicious option is to decrease the amount sugar in the potato mixture.

Then add a can of sweetened condensed milk and block of cream cheese mixed together on top of the potato mixture.

Finally top with a box of Gingerbread cake mix and butter. Baking time will increase with the extra creamy layer.

More Popular Thanksgiving Recipes

Overhead view of layers of rich sweet potato dump cake with an empty corner of the 9 x 13" pan.

More Easy Dessert Recipes

Easy Coconut Cake creates a sophisticated spin on a classic yellow cake with very little effort.

Old Fashioned Cream Pie Recipe is a rich and creamy pudding baked in a pie shell.

Cottage Cheese Cookie Dough is high in protein and has chocolate chips for extra deliciousness!

Crescent Roll Apple Pie is another fall favorite with shortcuts to save time in the kitchen without sacrificing flavor.

Tender buttery cake crumbs baked on a sweet potato pie mixture inspired by tiktok recipes.

Sweet Potato Dump Cake

Servings 16 pieces
Author: Jennifer
Mashed sweet potatoes are enhanced with a box of cake mix to create this easy Thanksgiving dessert called Sweet Potato Dump Cake.
Prep Time 15 minutes
Cook Time 35 minutes
Total Time 50 minutes


  • 3 sweet potatoes
  • 1/2 cup granulated sugar
  • 1/2 cup brown sugar
  • 1 cup butter divided
  • 1/3 cup milk
  • 1 tablespoon nutmeg
  • 1 tablespoon pumpkin pie spice
  • 1 tablespoon cinnamon
  • 1 tablespoon vanilla extract
  • 15 ounce box yellow cake mix


  • Peel sweet potatoes and cut into 1/2' thick disks. Boil until sweet potatoes are soft and easy to smash. Drain and mash well.
  • Add sugar, brown sugar, 1 stick of melted butter, milk, nutmeg, pumpkin pie spice, cinnamon and vanilla to the mashed sweet potatoes and stir well.
  • Pour into a lightly greased 9 x 13" pan or use two round cake pans.
  • Sprinkle box of cake mix on top.
  • Cut remaining stick of butter into thin slices and spread out on top of the cake mix.
  • Bake in a 350℉ preheated oven for 30 to 40 minutes until the cake mix is golden brown and baked through.


  • During baking if cake mix or flour is visible on top pour or spoon extra melted butter in those spots to help them soften, bake and brown.


Calories: 312kcalCarbohydrates: 42gProtein: 3gFat: 16gSaturated Fat: 8gPolyunsaturated Fat: 2gMonounsaturated Fat: 5gTrans Fat: 0.5gCholesterol: 31mgSodium: 338mgPotassium: 258mgFiber: 2gSugar: 25gVitamin A: 6378IUVitamin C: 1mgCalcium: 76mgIron: 2mg

Nutritional Disclaimer

“Plowing Through Life” is not a dietitian or nutrition professional. Any nutritional information shared is an estimate and can vary greatly depending on specific products are used. If calorie count and other nutritional values are important to you, we recommend running the ingredients through an online nutritional calculator of your choice.

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