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Close-up view of a moist Sweet Potato Butter Cake on a rustic wooden table, illuminated by soft natural light.
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Grandma’s Famous Sweet Potato Butter Cake: How to Make an Irresistible Classic in 2025

Prep Time 20 minutes
Cook Time 50 minutes
Total Time 1 hour 10 minutes
Servings 8 pieces
Calories 350
This classic sweet potato butter cake combines moist, flavorful layers with warm spices, perfect for any occasion.

Ingredients

Sweet Potatoes

  • 2 cups mashed sweet potatoes
  • 1 cup unsalted butter, softened
  • 2 cups granulated sugar
  • 4 large eggs
  • 1 teaspoon vanilla extract
  • 3 cups all-purpose flour
  • 1 tablespoon baking powder
  • 1 teaspoon baking soda
  • 1 teaspoon ground cinnamon
  • 1/2 teaspoon ground nutmeg
  • 1/4 teaspoon salt
  • 1 cup buttermilk

Instructions 

  • Preheat oven to 350°F (175°C) and grease a 9x13 inch pan.
  • Cream butter and sugar, add eggs and vanilla, then mix in dry ingredients and buttermilk alternately.
  • Fold in mashed sweet potatoes, pour into pan, and bake for 45-50 minutes.
  • Cool for 10 minutes, then serve plain or with whipped cream.

Notes

Ensure sweet potatoes are well mashed for a smooth batter.
Calories: 350kcal
Cost: $15
Course: Dessert
Cuisine: American
Keyword: sweet potato

Nutrition

Calories: 350kcal | Carbohydrates: 55g | Protein: 6g | Fat: 15g | Sodium: 250mg