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Ruby Red Grapefruit Sour Cream Cake

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This Grapefruit Sour Cream Cake is amazingly moist, bright with citrus and tart from the sour cream. A delicious cake best served with coffee or tea!
Course Desserts & Sweet Treats
Cuisine American
Keyword cake, citrus, dessert, glaze, grapefruit
Prep Time 30 mins
Cook Time 45 mins
Total Time 1 hr 15 mins
Servings 12 servings
Calories 242
Author Laurie McNamara


  • 1 cup granulated sugar
  • 2 tablespoons grapefruit zest from a ruby red grapefruit
  • 2 large eggs
  • 3 tablespoons ruby red grapefruit juice freshly squeezed and strained
  • 1/3 cup unsalted butter melted and cooled
  • cup unbleached all-purpose flour
  • 1 teaspoon kosher salt
  • 1 teaspoon baking powder
  • 1/2 cup sour cream
  • 2 tablespoons whole milk


  • 1 cup powdered sugar
  • 1 tablespoon sour cream
  • 1 to 2 tablespoons whole milk


  • Preheat your oven to 350° and line an 8x5 loaf pan with parchment paper, then spray with cooking spray.
  • In a large bowl combine the sugar and the two tablespoons of grapefruit zest. Use your fingers and rub the zest into the sugar until it resembles wet sand.
  • Add the two eggs, grapefruit juice and melted butter. Stir until those ingredients are incorporated.
  • In a separate bowl, combine the flour, salt and baking powder. Give it a good whisk to remove and clumps.
  • In a small bowl or measuring cup; combine the sour cream and milk and stir until combined.
  • Starting with the flour and ending with sour cream/ milk mixture. Alternate and a third of each until everything is mixed in well.
  • Pour the cake batter into the prepared pan and bake for 45 minutes or until a tester comes out clean. Let the cake rest in the pan for 10 minutes before running a knife along the edge and using the parchment paper to lift the cake out of the pan.
  • Let the cake cool completely on a wire rack. Mean while make the glaze by combining the powdered sugar, sour cream and thinning it out with the milk.
  • Drizzle the glaze over the cooled cake and let it sit to harden for a few minutes.


Serving: 1slice | Calories: 242kcal | Carbohydrates: 40g | Protein: 3g | Fat: 8g | Saturated Fat: 5g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 2g | Trans Fat: 1g | Cholesterol: 50mg | Sodium: 253mg | Potassium: 58mg | Fiber: 1g | Sugar: 27g | Vitamin A: 276IU | Vitamin C: 2mg | Calcium: 46mg | Iron: 1mg