Sweet, warmly spiced, and incredibly moist, this Sugar-Free Sweet Potato Honeybun Cake delivers all the comforting flavor of a classic honeybun cake without the added sugar. Made with naturally sweet sweet potatoes, cinnamon swirls, and a creamy sugar-free glaze, this dessert is perfect for breakfast, brunch, or an after-dinner treat. Every bite is soft, tender, and packed with cozy flavor.

Why You’ll Love This Recipe

Naturally sweetened with sugar-free ingredients
Moist and fluffy texture from mashed sweet potatoes
Rich cinnamon swirl throughout the cake
Lower in sugar while still tasting indulgent
Great for holidays, gatherings, or meal prep
Easy to make with simple pantry ingredients
Perfect with coffee or tea
Delicious warm or chilled

Ingredients

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

For the Cake:

2 cups mashed sweet potatoes
2 cups almond flour
1 cup oat flour
1 tablespoon baking powder
1 teaspoon baking soda
1 teaspoon ground cinnamon
1/2 teaspoon ground nutmeg
1/2 teaspoon salt
4 large eggs
3/4 cup unsweetened almond milk
1/2 cup melted coconut oil
3/4 cup granulated monk fruit sweetener
2 teaspoons vanilla extract

For the Cinnamon Swirl:

1/2 cup brown sugar substitute
2 teaspoons ground cinnamon
2 tablespoons melted butter

For the Sugar-Free Glaze:

1 cup powdered sugar substitute
2 tablespoons unsweetened almond milk
1/2 teaspoon vanilla extract

Directions

Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish or line it with parchment paper.
In a large mixing bowl, whisk together the almond flour, oat flour, baking powder, baking soda, cinnamon, nutmeg, and salt.
In another bowl, combine the mashed sweet potatoes, eggs, almond milk, melted coconut oil, monk fruit sweetener, and vanilla extract. Mix until smooth.
Gradually add the wet ingredients to the dry ingredients and stir until fully combined.
Pour half of the batter into the prepared baking dish and spread evenly.
In a small bowl, mix together the brown sugar substitute, cinnamon, and melted butter to create the cinnamon swirl mixture.
Sprinkle half of the cinnamon mixture over the batter. Add the remaining batter on top and spread gently.
Sprinkle the remaining cinnamon mixture evenly over the top. Use a knife to lightly swirl the cinnamon mixture into the batter.
Bake for 38 to 45 minutes, or until a toothpick inserted in the center comes out clean.
Allow the cake to cool for about 15 minutes.
While the cake cools, whisk together the powdered sugar substitute, almond milk, and vanilla extract until smooth.
Drizzle the glaze over the warm cake before slicing and serving.

Servings and timing

Servings: 12 slices
Prep Time: 20 minutes
Cook Time: 45 minutes
Cooling Time: 15 minutes
Total Time: 1 hour 20 minutes

Variations

Add chopped pecans or walnuts for extra crunch.
Mix in sugar-free white chocolate chips for a richer dessert.
Replace almond milk with coconut milk for a creamier texture.
Add a pinch of ground ginger or cloves for deeper spice flavor.
Use a cream cheese glaze made with sugar-free sweetener for a tangy finish.
Turn the recipe into muffins by baking the batter in a muffin tin for 20 to 25 minutes.

Storage/Reheating

Store leftover cake in an airtight container in the refrigerator for up to 5 days. For longer storage, wrap individual slices tightly and freeze for up to 2 months.

To reheat, microwave a slice for 15 to 20 seconds until warm. You can also warm slices in a 300°F oven for about 8 minutes.

FAQs

Can I use canned sweet potatoes?

Yes, canned sweet potatoes work well as long as they are unsweetened and thoroughly drained before mashing.

What is the best sugar substitute for this recipe?

Monk fruit sweetener and erythritol blends work especially well because they bake similarly to regular sugar.

Can I make this cake dairy-free?

Yes, the recipe is already dairy-free if you use dairy-free butter alternatives in the cinnamon swirl.

Can I use whole wheat flour instead of oat flour?

Yes, whole wheat flour can replace oat flour, though the texture may become slightly denser.

How do I know when the cake is fully baked?

Insert a toothpick into the center of the cake. If it comes out clean or with a few crumbs, the cake is ready.

Can I freeze the cake?

Yes, the cake freezes very well. Wrap slices individually and store them in a freezer-safe container.

Does this cake taste strongly like sweet potatoes?

No, the sweet potatoes mainly provide moisture and natural sweetness while blending nicely with the cinnamon flavor.

Can I make this recipe gluten-free?

Yes, simply ensure the oat flour you use is certified gluten-free.

What can I serve with this cake?

This cake pairs wonderfully with coffee, tea, or a scoop of sugar-free vanilla ice cream.

Can I make the glaze thicker?

Yes, add more powdered sugar substitute a little at a time until the glaze reaches your desired consistency.

Conclusion

Sugar-Free Sweet Potato Honeybun Cake is the perfect balance of comforting flavor and wholesome ingredients. With its moist texture, warm cinnamon swirl, and creamy sugar-free glaze, this cake offers all the satisfaction of a classic honeybun dessert while keeping the sugar content low. Whether served for brunch, dessert, or an afternoon snack, this recipe is sure to become a favorite in your kitchen.