Lemon Blueberry Cake – Easy Moist Layer Cake with Fresh Blueberries

There’s just something magical about the combo of lemon and blueberry, isn’t there? Bright, fresh, fruity, and totally irresistible. This Lemon Blueberry Cake is one of my favorite spring and summer bakes. It’s moist, fluffy, and packed with sweet-tart blueberries in every bite—topped with the dreamiest mascarpone whipped cream frosting and a layer of tangy lemon curd.

Whether you’re baking for Easter, a bridal shower, or just a sunny weekend treat, this cake is a total showstopper. Don’t let the layers scare you—this is a simple lemon blueberry cake that even beginners can master with a few helpful tips (I’ve got you covered!).

Why You’ll Love This Lemon Blueberry Cake Recipe

• Moist and tender crumb thanks to buttermilk and sour cream
• Bursts of blueberries in every slice
• Fresh lemon flavor in the cake and frosting
• Mascarpone whipped cream = ultra-light and not overly sweet
• Impressive presentation for any gathering or celebration

This is what I imagine an Italian lemon blueberry cake might taste like—fresh, bright, and full of love.

Ingredients You’ll Need

For the Cake:

• 2 cups (380g) granulated sugar
• ½ cup (118 ml) vegetable oil
• 3 large eggs
• Zest and juice of 2 lemons (for zest + 1/4 cup juice)
• 1 teaspoon (5ml) lemon or vanilla extract
• ½ cup (118 ml) light sour cream
• 2 ½ cups (350 g) all-purpose flour
• 3 teaspoons (11.2 g) baking powder
• 1 teaspoon (5 g) salt
• 1 cup (236 ml) buttermilk (or milk)
• 9 ounces fresh blueberries (washed and dried)
• 2 tablespoons (15.6g) all-purpose flour (to coat berries)

For the Frosting:

• 2 ¼ cups (532 ml) heavy whipping cream
• 1 cup (130g) powdered sugar
• 1 teaspoon (5ml) pure vanilla extract
• 16 ounces mascarpone cheese (cold)
• 1 jar (10 ounces) lemon curd

How to Make Lemon Blueberry Cake – Step by Step

1. Prep Your Pans & Oven

• Preheat oven to 350°F (175°C).
• Line three 8-inch round baking pans with parchment and grease the sides.
• Use bake-even strips if you have them.

2. Make the Cake Batter

1. In a large bowl, beat sugar, oil, eggs, and lemon extract for 2 minutes until light and fluffy.
2. Add lemon zest, lemon juice, and sour cream. Mix until well combined.
3. In another bowl, whisk together flour, baking powder, and salt.
4. Add half the dry ingredients to the batter, then slowly pour in half the buttermilk while mixing on low.
5. Repeat with the remaining flour and buttermilk. Mix just until combined.
6. Toss blueberries with 2 tablespoons flour and gently fold them into the batter, saving a few for topping.

Pro Tip: Coating berries in flour helps prevent them from sinking to the bottom.

3. Bake the Layers

• Divide batter evenly between pans (about 1 2/3 cups per pan).
• Drop the reserved blueberries on top.
• Bake for 20–23 minutes, rotating pans halfway.
• Test with a toothpick—if it comes out clean, they’re ready!
• Let cakes cool completely before frosting.

How to Make Mascarpone Whipped Cream Frosting

1. Chill your mixing bowl and whisk attachment in the freezer for 5–10 minutes.
2. Beat cold mascarpone cheese on medium-low until creamy.
3. Slowly add cold heavy cream and whip until soft peaks form.
4. Add powdered sugar and vanilla. Mix on low, then beat on high until stiff peaks form.

Don’t over-whip! Stop once it holds its shape. This frosting is lighter than buttercream but just as satisfying.

How to Assemble the Cake

1. Level your cake layers with a serrated knife or cake leveler.
2. Add a small amount of frosting to your cake board to hold the bottom layer.
3. Pipe or spread a layer of frosting over the first cake layer.
4. Spread half of the lemon curd over the frosting.
5. Repeat with second cake layer and the rest of the lemon curd.
6. Top with the third cake layer.
7. Use the remaining frosting to fill in gaps, coat the outside, and smooth with an offset spatula.
8. Decorate with piped florets, lemon slices, and a few extra blueberries.

This cake must be refrigerated because of the whipped cream and mascarpone.

Tips for the Best Lemon Blueberry Cake

• Use fresh blueberries (not frozen) for best texture.
• Zest your lemons before juicing—it’s much easier!
• Chill your frosting tools and ingredients.
• Don’t overmix the batter—it keeps the cake tender.
• Store leftovers in the fridge, loosely covered, for up to 3 days.

Make It Your Own – Flavor Variations

• Use cream cheese frosting for a richer taste.
• Add poppy seeds for a lemon-poppy spin.
• Make it a sheet cake or cupcakes for a picnic-style dessert.
• Try a drizzle of white chocolate ganache for a bakery-style finish.

FAQs About Lemon Blueberry Cake

What does lemon blueberry cake taste like?

Bright, tangy, and sweet! The lemon adds freshness, and the blueberries burst with juicy flavor.

Can I make this cake ahead of time?

Yes! Bake the cake layers a day ahead and store tightly wrapped. Assemble the day you plan to serve.

Can I use frozen blueberries?

I don’t recommend it—they tend to bleed and turn the batter purple. Stick with fresh for the best result.

What frosting goes best with lemon blueberry cake?

Mascarpone whipped cream is light and complements the fruit. Cream cheese or lemon buttercream also work beautifully.

Is this a good birthday cake?

Absolutely! It’s bright, beautiful, and a great spring or summer celebration cake.

Try These Fruity Favorites Next:

Protein-Packed Blueberry Baked Oatmeal Cups

Strawberry Crunch Poke Cake Recipe

Homemade Blackberry Lemonade

Final Thoughts from My Kitchen

This Lemon Blueberry Cake is sunshine in dessert form. It’s one of those bakes that makes people say, “Wow—did you really make this?” and you get to smile and say, “Yep!”

Perfect for spring holidays, birthdays, or anytime you want something bright and beautiful.

If you make it, I’d love to see your version! Tag me on Pinterest and show off your lemony masterpiece.

Print