This cake stands out for its perfect balance of flavors—zesty grapefruit adds freshness while sour cream keeps the texture incredibly moist and tender. It’s easy to make yet feels elegant enough for special occasions. The subtle tanginess makes it less sweet than typical cakes, making it a great choice for those who prefer a more refined dessert.
Ingredients
(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)
all-purpose flour
baking powder
baking soda
salt
unsalted butter, softened
granulated sugar
eggs
sour cream
fresh grapefruit juice
grapefruit zest
vanilla extract
powdered sugar (optional, for glaze)
Directions
Preheat your oven to 350°F (175°C) and grease a loaf pan or round cake pan.
In a bowl, whisk together flour, baking powder, baking soda, and salt.
In a large bowl, cream the butter and sugar until light and fluffy.
Add eggs one at a time, mixing well after each addition.
Stir in sour cream, grapefruit juice, zest, and vanilla extract.
Gradually fold in the dry ingredients until just combined.
Pour the batter into the prepared pan and smooth the top.
Bake for 40–50 minutes, or until a toothpick inserted in the center comes out clean.
Let the cake cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.
If desired, mix powdered sugar with a little grapefruit juice and drizzle over the cooled cake.
Servings and timing
This recipe yields about 8–10 slices. Preparation takes approximately 15–20 minutes, baking takes 40–50 minutes, and cooling takes about 30 minutes, for a total time of around 1 hour 30 minutes.
Variations
You can swap grapefruit with orange or lemon for a different citrus flavor. Add a light glaze infused with honey for extra sweetness or include poppy seeds for a subtle crunch. For a richer version, fold in a handful of white chocolate chips. You can also bake this as muffins instead of a full cake for individual servings.
Storage/Reheating
Store the cake in an airtight container at room temperature for up to 2 days or refrigerate for up to 5 days. Let refrigerated slices come to room temperature before serving for the best texture. You can warm slices slightly in the microwave for a softer bite, though it’s equally delicious served as is.
FAQs
Can I use bottled grapefruit juice?
Fresh juice is recommended for the best flavor, but bottled can be used if needed.
What does sour cream do in the cake?
It adds moisture and richness, resulting in a tender crumb.
Can I make this cake ahead of time?
Yes, it can be made a day in advance and stored covered.
How do I prevent the cake from being too dense?
Avoid overmixing the batter and measure ingredients accurately.
Can I freeze this cake?
Yes, wrap it tightly and freeze for up to 2 months.
Can I use yogurt instead of sour cream?
Yes, plain full-fat yogurt is a good substitute.
What type of pan works best?
A loaf pan or an 8-inch round cake pan works well.
How do I enhance the grapefruit flavor?
Add extra zest or a grapefruit glaze for a stronger citrus taste.
Can I make it gluten-free?
Yes, use a gluten-free flour blend designed for baking.
Is this cake very sweet?
No, it has a balanced sweetness with a noticeable citrus tang.
Conclusion
Grapefruit Sour Cream Cake is a refreshing and elegant dessert that brings together tangy citrus and a moist, rich texture. It’s simple to prepare yet delivers a unique flavor that sets it apart, making it a wonderful addition to your baking collection.
Grapefruit Sour Cream Cake is a moist, tender citrus cake bursting with fresh grapefruit flavor and balanced with rich sour cream. This Grapefruit Sour Cream Cake is perfect for those who love a slightly tangy, not overly sweet dessert with a soft, delicate crumb.
Author:Catherine
Prep Time:15–20 minutes
Cook Time:40–50 minutes
Total Time:1 hour 30 minutes
Yield:8–10 servings
Category:Dessert
Method:Baking
Cuisine:American
Diet:Vegetarian
Ingredients
2 cups all-purpose flour 1 teaspoon baking powder 1/2 teaspoon baking soda 1/2 teaspoon salt 1/2 cup unsalted butter, softened 1 cup granulated sugar 2 large eggs 1 cup sour cream 1/3 cup fresh grapefruit juice 1 tablespoon grapefruit zest 1 teaspoon vanilla extract
Optional Glaze: 1/2 cup powdered sugar 1–2 tablespoons grapefruit juice
Instructions
Preheat oven to 350°F (175°C) and grease a loaf pan or 8-inch round cake pan.
In a medium bowl, whisk together flour, baking powder, baking soda, and salt.
In a large bowl, cream butter and sugar until light and fluffy.
Add eggs one at a time, mixing well after each addition.
Stir in sour cream, grapefruit juice, zest, and vanilla extract.
Gradually fold in the dry ingredients until just combined.
Pour batter into the prepared pan and smooth the top.
Bake for 40–50 minutes, or until a toothpick inserted in the center comes out clean.
Let the cake cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.
If using glaze, mix powdered sugar with grapefruit juice and drizzle over the cooled cake.
Notes
Use fresh grapefruit juice and zest for the brightest flavor. Do not overmix the batter to keep the cake light and tender.Sour cream ensures a moist, rich texture.Add poppy seeds or white chocolate chips for variation.You can substitute plain full-fat yogurt for sour cream if needed.Store in an airtight container for best freshness.
