Moist and tender marble cake that combines sweet potato and chocolate in every swirl—comforting, rich, and delightfully surprising.

Scale

1 cup mashed sweet potatoes

1 cup all-purpose flour

½ cup unsweetened cocoa powder

1 cup granulated sugar

½ cup brown sugar

½ cup vegetable oil

3 large eggs

1 teaspoon vanilla extract

1 teaspoon baking powder

½ teaspoon baking soda

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1. Preheat oven to 350°F and grease cake pan.

2. Mash cooked sweet potato and let cool.

3. Whisk sugars, oil, eggs, vanilla; fold in sweet potato.

4. Divide batter; add cocoa and leaveners to one half.

5. Layer batters and swirl for marble effect.

6. Bake 45–50 minutes until toothpick comes out clean.

7. Cool before slicing and serving.

You can use canned sweet potato puree for convenience.

Add orange zest or cinnamon for a flavor boost.

Great with whipped cream, ice cream, or coffee on the side.