Sweet Potato Spice Sheet Cake with Maple Frosting
A moist, warmly spiced sheet cake built on sweet potato puree for natural sweetness and tender crumb, finished with a maple-buttered frosting. Cinnamon and nutmeg provide classic fall flavors that pair beautifully with the earthy potato base. Serve this at autumn gatherings, potlucks, or casual weeknight desserts. The sheet pan format makes it effortless to portion and transport, while the simple spice profile keeps baking approachable for home cooks of all levels.
Ingredients
- 8 tablespoon unsalted butter, softened
- ¾ cup granulated sugar
- 2 egg, largeapplesauce1/4 cup per eggveganeggs-free
increases moisture; reduce vanilla to 1/2 teaspoon
Full guide → - 1 teaspoon vanilla extract
- 1 ¼ cup all-purpose flourgluten-free 1-to-1 flour1:1gluten-freegluten-free
may need 1-2 tablespoons additional liquid
- 1 ½ teaspoon baking powder
- ¼ teaspoon salt
- 1 teaspoon ground cinnamon
- 1 pinch ground nutmeg
- ¾ cup sweet potato puree, unsweetenedpumpkin puree1:1substitution
shifts flavor toward fall pumpkin spice
- 2 cup powdered confectioners sugar, sifted
- 2 tablespoon unsalted butter, softened
- 3 tablespoon maple syrup, pure
Instructions
- 1
Preheat oven to 350 degrees F (350°F) and grease a 9x9 square baking pan.
- 2
Cream butter and granulated sugar in a stand mixer until light and fluffy.
- 3
Add eggs one at a time, mixing until fully incorporated.
- 4
Mix in vanilla extract.
- 5
In a separate bowl, whisk together flour, baking powder, salt, cinnamon, and nutmeg.
- 6
Alternately add flour mixture and sweet potato puree to the creamed mixture, beginning and ending with flour, until a stiff batter forms.
- 7
Spread batter into prepared pan.
- 8
Bake for 25 minutes until a toothpick inserted in the center comes out clean.
- 9
While cake bakes, combine powdered sugar, butter, and maple syrup in the stand mixer, adjusting consistency with additional maple syrup or sugar as needed.
- 10
Cool cake completely in pan before frosting and serving.
Tips
Use pure sweet potato puree without added sugars or spices; canned pumpkin puree is not a direct substitute due to texture and flavor differences.
Cool the cake completely before frosting to prevent melting; frosting will set better on a room-temperature surface.
Adjust frosting consistency by adding maple syrup for a thinner spread or powdered sugar for a thicker consistency.
Good to Know
Cover tightly and refrigerate up to 4 days. Unfrosted cake can be wrapped and frozen up to 3 months.
Bake the cake up to 2 days ahead; store covered at room temperature. Prepare frosting while cake cools.
Serve at room temperature. Pairs well with coffee, tea, or a glass of cold milk.
Common Mistakes
Do not skip cooling the cake completely to avoid frosting melting and sliding off.
Do not over-mix the batter after adding flour to avoid a dense, tough crumb.
Do not use sweetened canned sweet potato filling instead of plain puree to prevent excessive sweetness.
Substitutions
Dairy-Free Swaps
Vegan Options
increases moisture; reduce vanilla to 1/2 teaspoon
Full guide →Gluten-Free Swaps
may need 1-2 tablespoons additional liquid
General Alternatives
FAQ
Can I make this cake ahead?
Yes. Bake the unfrosted cake up to 2 days ahead and store covered at room temperature. Prepare frosting while the cake cools, or make frosting just before serving for the best texture and spreadability.
Can I freeze this cake?
Unfrosted cake freezes well up to 3 months when wrapped tightly. Thaw at room temperature before frosting. Frosted cake can be frozen up to 1 month but texture may soften slightly upon thawing.
What if my frosting is too thick or too thin?
Add more maple syrup a tablespoon at a time for a thinner, pourable consistency, or add powdered sugar a quarter-cup at a time for a thicker, spreadable consistency.