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Grandma’s Famous Sweet Potato Butter Cake


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  • Author: Paula
  • Total Time: 1 hour to 1 hour 15 minutes
  • Yield: 12-15 servings (9x13-inch pan) or 8-10 servings (bundt pan)
  • Diet: Vegetarian

Description

Grandma’s Famous Sweet Potato Butter Cake is a moist and flavorful dessert made with mashed sweet potatoes and warm spices, perfect for any occasion.


Ingredients

  • 1 cup (2 sticks) unsalted butter, softened
  • 1½ cups granulated sugar
  • 4 large eggs
  • 1 cup mashed sweet potatoes (about 1 large cooked and peeled sweet potato)
  • ½ cup sour cream (room temperature)
  • ¼ cup milk (whole or 2%)
  • 2 teaspoons vanilla extract
  • 2 cups all-purpose flour
  • 2 teaspoons baking powder
  • ½ teaspoon baking soda
  • ½ teaspoon salt
  • 1 teaspoon ground cinnamon
  • ¼ teaspoon ground nutmeg
  • Optional Glaze:
  • 4 tablespoons (½ stick) unsalted butter, melted
  • ½ cup powdered sugar
  • 12 tablespoons milk
  • ½ teaspoon vanilla extract

Instructions

  1. Preheat oven to 350°F (175°C). Grease and flour a 9×13-inch baking dish or bundt pan.
  2. In a large bowl, beat softened butter and sugar together until light and fluffy, about 2–3 minutes. Scrape sides as needed.
  3. Add eggs one at a time, mixing well after each addition.
  4. Stir in mashed sweet potatoes, sour cream, milk, and vanilla extract until smooth.
  5. In a separate bowl, whisk together flour, baking powder, baking soda, salt, cinnamon, and nutmeg.
  6. Gradually add dry ingredients to wet ingredients, stirring gently until just combined. Avoid overmixing.
  7. Pour batter into prepared pan and smooth top with a spatula.
  8. Bake in a 9×13-inch pan for 40–45 minutes or in a bundt pan for 50–60 minutes, until a toothpick inserted in the center comes out clean.
  9. Let cake cool in pan for 15 minutes, then transfer to wire rack to cool completely.
  10. For the glaze (optional), melt butter in a small saucepan. Whisk in powdered sugar, milk, and vanilla extract until smooth. Drizzle over cooled cake.
  11. Slice and serve.

Notes

  • For best results, use room temperature ingredients.
  • The glaze is optional but adds a nice finish to the cake.
  • Store leftovers in an airtight container at room temperature for up to 3 days or refrigerate for up to a week.
  • Prep Time: 15 minutes
  • Cook Time: 45-60 minutes
  • Category: Dessert
  • Method: Baking
  • Cuisine: American

Nutrition

  • Serving Size: 1 slice
  • Calories: 320
  • Sugar: 26g
  • Sodium: 220mg
  • Fat: 15g
  • Saturated Fat: 9g
  • Unsaturated Fat: 4g
  • Trans Fat: 0g
  • Carbohydrates: 42g
  • Fiber: 1g
  • Protein: 4g
  • Cholesterol: 70mg