Sweet potato bars with maple frosting are a comforting dessert packed with warm spices and rich autumn flavor. These soft, cake-like bars combine creamy mashed sweet potatoes with ground walnuts for a moist texture and subtle nuttiness. Topped with fluffy maple buttercream frosting, they create a perfectly balanced treat that’s ideal for fall gatherings, holiday dessert tables, or anytime you want something cozy and sweet.
Why You’ll Love This Recipe
These sweet potato bars offer a delicious twist on classic fall desserts. Instead of traditional pies or cakes, these bars provide a convenient, sliceable dessert that’s easy to serve for both small family dinners and larger celebrations.
The combination of sweet potatoes and warm spices creates a comforting flavor profile that perfectly suits cooler seasons. Ground walnuts in the batter add richness and help create a dense, tender crumb, while chopped walnuts give each bite a pleasant crunch.
The maple frosting is the finishing touch that elevates this dessert. Its creamy texture and gentle maple flavor pair beautifully with the spiced sweet potato base. Together, they create a dessert that feels festive yet simple to prepare.
These bars are also easy to make ahead, making them perfect for holiday meal planning.
Ingredients
(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)
Sweet Potato Bars
1/2 cup butter, room temperature
1/2 cup brown sugar
1 large egg, room temperature
1 egg yolk, room temperature
1 teaspoon vanilla extract
1 cup cooked mashed sweet potato
1 cup all-purpose flour
1 cup finely ground walnuts
1 teaspoon baking powder
1/2 teaspoon salt
1 teaspoon ground cinnamon
1 teaspoon ground ginger
1/2 teaspoon ground nutmeg
1/4 teaspoon ground cloves
1/2 cup milk, room temperature
1/4 cup chopped walnuts
Maple Buttercream Frosting
1/2 cup unsalted butter, room temperature
2 cups powdered sugar
1 1/4 teaspoons maple syrup flavoring
1/4 teaspoon vanilla extract
1/4 teaspoon salt
2 tablespoons whipping cream
Directions
Preheat the oven to 350°F (175°C). Line a 9×13-inch baking pan with parchment paper or lightly grease it.
In a large mixing bowl or stand mixer, beat the butter and brown sugar together until the mixture becomes light and fluffy.
Add the egg and egg yolk one at a time, mixing well after each addition. Stir in the vanilla extract and mashed sweet potato until the mixture is smooth.
In a separate bowl, whisk together the all-purpose flour, finely ground walnuts, baking powder, salt, cinnamon, ginger, nutmeg, and cloves.
Gradually add half of the dry mixture into the wet ingredients and mix until just combined. Pour in the milk and mix gently. Add the remaining flour mixture and stir until a smooth batter forms.
Fold in the chopped walnuts.
Spread the batter evenly into the prepared baking pan. Bake for 15 to 20 minutes, or until a toothpick inserted in the center comes out clean.
Remove from the oven and allow the bars to cool completely in the pan before adding frosting.
To make the frosting, place the butter and 1/2 cup powdered sugar in a mixing bowl and beat at medium speed until creamy.
Add the remaining powdered sugar gradually, about 1/2 cup at a time, mixing until smooth after each addition.
Mix in the salt and maple flavoring. Add the vanilla extract and blend well.
Pour in the whipping cream one tablespoon at a time and beat on high speed until the frosting becomes light, fluffy, and spreadable.
Spread the maple buttercream evenly over the cooled sweet potato bars. Slice into squares or rectangles before serving.
For a deeper nutty flavor, pecans can replace the walnuts in both the batter and topping. Pecans complement the sweet potato and maple combination very well.
You can also add a handful of raisins or chopped dried dates to the batter for extra sweetness and texture.
For a slightly lighter frosting, reduce the powdered sugar and add an extra tablespoon of whipping cream to create a softer, less sweet topping.
Another option is to sprinkle toasted walnuts or pecans over the frosting for added crunch and visual appeal.
Storage/Reheating
Store the frosted sweet potato bars in an airtight container in the refrigerator for up to 4 days. The frosting helps keep the bars moist and flavorful.
If you prefer to serve them slightly warm, allow the bars to sit at room temperature for about 20 minutes before serving.
Unfrosted bars can also be frozen. Wrap them tightly in plastic wrap and place them in a freezer-safe container for up to 2 months. Thaw overnight in the refrigerator and frost before serving.
FAQs
Can I use canned sweet potato instead of fresh?
Yes, canned sweet potato puree works well. Make sure it is plain and not sweetened or spiced.
How do I cook sweet potatoes for this recipe?
You can bake, steam, or microwave sweet potatoes until soft, then mash them until smooth.
Can I make these bars ahead of time?
Yes, these bars can be baked a day in advance. Store them covered and frost them before serving.
Can I skip the nuts?
Yes, you can omit the walnuts if you prefer. The texture will be slightly softer but still delicious.
Can I use pecans instead of walnuts?
Yes, pecans are an excellent substitute and pair well with maple frosting.
Why are ground walnuts used in the batter?
Ground walnuts help create a rich, dense texture similar to a soft cake.
Can I make the frosting without maple flavoring?
Yes, you can substitute it with a small amount of maple syrup, though the flavor may be lighter.
How do I know when the bars are done baking?
Insert a toothpick into the center. If it comes out clean or with a few crumbs, the bars are ready.
Can I double the recipe?
Yes, you can double the ingredients and bake the batter in two pans.
Do these bars need to be refrigerated?
Because of the buttercream frosting, storing them in the refrigerator is recommended for freshness.
Conclusion
Sweet potato bars with maple frosting are a comforting dessert filled with warm spices, creamy sweet potato, and crunchy walnuts. Their soft, cake-like texture combined with fluffy maple buttercream makes them perfect for fall celebrations, holiday gatherings, or simply enjoying with a warm drink. Easy to prepare and simple to slice and serve, these bars are a delightful alternative to traditional seasonal desserts.
Soft and warmly spiced sweet potato dessert bars made with mashed sweet potatoes and ground walnuts for a moist texture, topped with fluffy maple buttercream frosting for a cozy fall-inspired treat.
Ingredients
1/2 cup butter, room temperature
1/2 cup brown sugar
1 large egg, room temperature
1 egg yolk, room temperature
1 teaspoon vanilla extract
1 cup cooked mashed sweet potato
1 cup all-purpose flour
1 cup finely ground walnuts
1 teaspoon baking powder
1/2 teaspoon salt
1 teaspoon ground cinnamon
1 teaspoon ground ginger
1/2 teaspoon ground nutmeg
1/4 teaspoon ground cloves
1/2 cup milk, room temperature
1/4 cup chopped walnuts
1/2 cup unsalted butter, room temperature (for frosting)
2 cups powdered sugar
1 1/4 teaspoons maple syrup flavoring
1/4 teaspoon vanilla extract
1/4 teaspoon salt
2 tablespoons whipping cream
Instructions
Preheat the oven to 350°F (175°C) and line a 9×13-inch baking pan with parchment paper or lightly grease it.
In a large mixing bowl beat the butter and brown sugar until light and fluffy.
Add the egg and egg yolk one at a time, mixing well after each addition.
Mix in the vanilla extract and mashed sweet potato until smooth.
In a separate bowl whisk together the flour, ground walnuts, baking powder, salt, cinnamon, ginger, nutmeg, and cloves.
Add half of the dry mixture to the wet ingredients and mix until just combined.
Pour in the milk and stir gently.
Add the remaining dry mixture and mix until a smooth batter forms.
Fold in the chopped walnuts.
Spread the batter evenly into the prepared pan.
Bake for 15–20 minutes or until a toothpick inserted in the center comes out clean.
Allow the bars to cool completely before frosting.
To make the frosting beat the butter with 1/2 cup powdered sugar until creamy.
Add the remaining powdered sugar gradually, mixing well after each addition.
Mix in the salt and maple flavoring.
Add the vanilla extract and whipping cream one tablespoon at a time, beating until the frosting becomes light and fluffy.
Spread the maple buttercream evenly over the cooled bars.
Cut into squares or rectangles before serving.
Notes
Make sure the sweet potato is fully cooked and mashed smooth before adding to the batter.
Allow the bars to cool completely before frosting to prevent the buttercream from melting.
Pecans can be substituted for walnuts for a different nutty flavor.
Toasted nuts sprinkled on top of the frosting add extra crunch.
The bars taste even better the next day as the spices develop.
