
If you love lemon and blueberry together, you’re in for a treat! This Lemon Blueberry Cake is soft, moist, and bursting with fresh flavors. The fluffy lemon cake is packed with juicy blueberries and topped with a light and creamy mascarpone frosting. Add a layer of tangy lemon curd between the layers, and you’ve got the ultimate lemon blueberry cake that’s perfect for any occasion!
Why You’ll Love This Lemon Blueberry Cake
- Easy to make: No special skills or tools needed!
- Super flavorful: A bright lemony flavor balanced by sweet blueberries.
- Perfectly moist: Thanks to oil, sour cream, and buttermilk.
- Impressive yet simple: Looks fancy but is easy enough for beginners.
- Versatile: Works as a birthday cake, summer dessert, or brunch treat.

Ingredients & Substitutions
Here’s what you’ll need to make this delicious lemon blueberry cake:
Cake Ingredients:
- Granulated sugar (2 cups): Adds sweetness and keeps the cake moist.
- Vegetable oil (1/2 cup): Creates a soft and tender texture.
- Eggs (3 large): Helps with structure and richness.
- Lemons (2, zested & juiced): Gives a fresh citrus kick.
- Lemon or vanilla extract (1 tsp): Enhances the lemony taste.
- Sour cream (1/2 cup): Keeps the cake soft and moist.
- All-purpose flour (2 1/2 cups): Provides structure.
- Baking powder (3 tsp): Helps the cake rise.
- Salt (1 tsp): Balances the flavors.
- Buttermilk (1 cup): Adds moisture and acidity.
- Fresh blueberries (9 oz): Bursting with juicy sweetness.
- All-purpose flour (2 tbsp, for coating blueberries): Helps prevent sinking.
Frosting Ingredients:
- Heavy whipping cream (2 1/4 cups): Creates a light and fluffy texture.
- Powdered sugar (1 cup): Sweetens and thickens the frosting.
- Vanilla extract (1 tsp): Adds a touch of warmth.
- Mascarpone cheese (16 oz, cold): Makes the frosting rich and creamy.
- Lemon curd (10 oz jar): Optional, but adds an extra lemon punch.

Can I Use Frozen Blueberries?
Yes! Frozen blueberries work, but do not thaw them before adding to the batter. They may release extra moisture, so coat them lightly in flour to help prevent sinking.
How to Make Lemon Blueberry Cake
1: Make the Cake
- Preheat the oven to 350°F. Line three 8-inch cake pans with parchment paper and grease the sides.
- Mix wet ingredients: Beat sugar, oil, eggs, and extract until smooth. Add lemon zest, juice, and sour cream.
- Mix dry ingredients: In another bowl, whisk flour, baking powder, and salt.
- Combine wet and dry: Alternate adding dry ingredients and buttermilk, mixing just until combined.
- Prepare blueberries: Toss them with 2 tbsp of flour, then gently fold into the batter.
- Bake: Divide batter evenly among pans. Sprinkle a few extra berries on top. Bake for 20-23 minutes or until a toothpick inserted comes out clean.
- Cool completely before frosting.
2: Make the Frosting
- Chill the mixing bowl and whisk for 5-10 minutes.
- Beat mascarpone on low speed while slowly adding heavy cream.
- Increase speed and whip until soft peaks form.
- Add powdered sugar and vanilla, then whip until stiff peaks form.

3: Assemble & Decorate
- Level the cakes by cutting off domed tops.
- Frost the first layer, then spread half the lemon curd on top.
- Repeat with the second layer.
- Top with the final cake layer (bottom side up for a flat surface).
- Frost the cake with a thin crumb coat, then add the final layer.
- Decorate with extra blueberries and lemon slices.
Serving Suggestions
This Lemon Blueberry Cake pairs beautifully with:
- A cup of hot tea or coffee for a delightful afternoon treat.
- A scoop of vanilla or lemon ice cream for a refreshing contrast.
- A drizzle of warm blueberry sauce to enhance the fruity flavors.
- A glass of sparkling lemonade for a bright and zesty pairing.

FAQs
Absolutely! The tartness of lemon enhances the natural sweetness of blueberries, creating a well-balanced and refreshing flavor combination.
It’s light, moist, and fluffy with a zesty lemon kick and juicy bursts of blueberry sweetness. The mascarpone frosting adds a creamy, rich finish.
Yes! Use them straight from the freezer and skip the flour-coating step. Avoid thawing, as they release excess moisture.
Mascarpone whipped cream is a perfect match! Other great options include cream cheese frosting or lemon buttercream.
Since this cake contains mascarpone frosting and lemon curd, store it in an airtight container in the fridge for up to 3 days.

More Lemon & Blueberry Dessert Ideas
If you love this lemon blueberry cake, try these delicious desserts:
This Lemon Blueberry Cake is easy, flavorful, and perfect for any occasion. Whether you’re making it for a birthday, brunch, or just because—this cake is guaranteed to impress. If you try this recipe, leave a comment below and let me know how it turned out!


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The Best Lemon Blueberry Cake Recipe
- Total Time: 45 minutes
- Yield: 12 servings 1x
- Diet: Vegetarian
Description
A moist and flavorful lemon blueberry cake with layers of mascarpone frosting and tangy lemon curd. Perfect for any occasion!
Ingredients
- 2 cups granulated sugar
- 1 cup vegetable oil
- 4 large eggs
- 2 tablespoons lemon zest
- 1/4 cup fresh lemon juice
- 1 teaspoon lemon extract (optional)
- 1/2 cup sour cream
- 3 cups all-purpose flour
- 1 tablespoon baking powder
- 1/2 teaspoon salt
- 1 cup buttermilk
- 2 cups fresh blueberries (tossed in flour)
- 1/2 cup lemon curd
- 2 cups heavy whipping cream
- 1 cup powdered sugar
- 1 teaspoon vanilla extract
- 8 ounces mascarpone cheese
Instructions
- Preheat oven to 350°F (177°C). Line three 8-inch cake pans with parchment paper and grease.
- In a large bowl, beat sugar, oil, eggs, and lemon extract until creamy.
- Add lemon zest, lemon juice, and sour cream, mixing well.
- In another bowl, whisk flour, baking powder, and salt.
- Alternate adding dry ingredients and buttermilk, mixing until combined.
- Fold in flour-coated blueberries.
- Divide batter into pans and bake for 20-23 minutes. Let cool.
- Chill mixing bowl and whisk attachment for 10 minutes.
- Beat mascarpone cheese, then slowly add heavy cream.
- Increase speed and beat until soft peaks form.
- Add powdered sugar and vanilla extract, then beat until stiff peaks form.
- Trim cake layers if needed. Spread mascarpone frosting on the first layer.
- Add half the lemon curd, leaving a small border.
- Repeat with second layer, then place third layer on top.
- Frost cake with a thin layer of frosting.
- Decorate with blueberries and lemon slices.
Notes
Toss blueberries in flour to prevent sinking. Store cake in fridge for up to 3 days.
- Prep Time: 20 minutes
- Cook Time: 23 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 slice
- Calories: 380
- Sugar: 28g
- Sodium: 160mg
- Fat: 20g
- Saturated Fat: 10g
- Unsaturated Fat: 8g
- Trans Fat: 0g
- Carbohydrates: 45g
- Fiber: 1g
- Protein: 5g
- Cholesterol: 60mg
Keywords: lemon blueberry cake, mascarpone frosting, easy cake recipe