This bright, beautiful lemon blueberry cake is soft, fluffy, and bursting with fresh blueberries and zesty lemon in every bite. I made it for my mom's birthday last spring, and it disappeared so fast I barely got a second slice. The vanilla cake stays moist and tender, the lemon buttercream is creamy and tangy, and the fresh blueberries add pops of juicy sweetness throughout.
If you love simple, show-stopping desserts, you'll also enjoy my Cottage Cheese Pizza Bowl for a savory twist, or my Tater Tot Breakfast Casserole for an easy, crowd-pleasing brunch.
Why You will Love This Lemon Blueberry Cake
This cake is everything you want in a celebration dessert: it's gorgeous, it tastes fresh and bright, and it's surprisingly easy to make. Starting with a boxed cake mix cuts down on time and effort, but the fresh lemon juice, zest, and blueberries make it taste completely homemade. The lemon buttercream frosting is silky, not too sweet, and has just the right amount of tang to balance the vanilla cake. The blueberries stay tender and jammy inside, and the lemon slices on top make it look like you spent hours decorating.
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Lemon Blueberry Cake Ingredients
Here's everything for the cake layers, lemon buttercream, and garnish.
See Recipe Card Below This Post For Ingredient Quantities
For the Cake:
- Vanilla cake mix: A 15.25-ounce box makes this recipe quick and easy. You'll also need the ingredients listed on the box, which usually include eggs, oil, and water.
- Lemon juice and zest: The juice adds bright, tangy flavor, and the zest brings out the natural lemon oils. Use 1 ½ lemons total, dividing the juice and zest between the cake and the frosting.
- Fresh blueberries: Use plump, fresh blueberries for the best flavor and texture. Frozen blueberries can work in a pinch, but they tend to bleed more color into the batter.
- All-purpose flour: Tossing the blueberries in flour keeps them from sinking to the bottom of the cake while it bakes.
the Frosting:
- Unsalted butter: Two sticks create a rich, creamy base for the buttercream. Let the butter sit at room temperature for about 30 minutes so it's soft and easy to beat.
- Powdered sugar: Sweetens the frosting and gives it a smooth, silky texture.
- Heavy cream: Adds creaminess and helps thin the frosting to the perfect spreading consistency.
- Pure vanilla extract: Enhances the sweetness and complements the lemon flavor.
- Kosher salt: A small pinch balances the sweetness and brings out the other flavors.
For Garnish:
- Thin lemon slices: Fresh lemon slices on top make the cake look elegant and tie in the lemon flavor.
- Remaining blueberries: Scattered on top for color and freshness.
- Additional lemon zest: A sprinkle of zest adds a pop of bright yellow and extra lemon aroma.
How to Make Lemon Blueberry Cake
Follow these steps for soft, fluffy layers and silky lemon buttercream.
- Prep the oven and pans: Preheat your oven to 350°F (175°C). Grease three 9-inch cake pans with cooking spray and line the bottoms with parchment paper so the cakes release easily.
- Prepare the cake batter: Make the vanilla cake mix according to the package directions. Stir in the juice and zest of 1 lemon, mixing until everything is well combined.
- Add the blueberries: In a small bowl, toss 1 cup of the fresh blueberries with the flour until they're evenly coated. This keeps them from sinking to the bottom of the pans. Gently fold the coated blueberries into the batter, being careful not to overmix.
- Bake the cakes: Divide the batter evenly among the three prepared pans. Bake for 18 to 20 minutes, or until a toothpick inserted in the center comes out clean. The tops should be lightly golden and spring back when touched.
- Cool the cakes: Let the cakes cool in the pans for about 10 minutes. Run a knife around the edges, then invert the cakes onto a wire rack. Peel off the parchment paper and let the cakes cool completely before frosting.
- Make the frosting: In a large bowl, beat the softened butter with 2 ½ cups of powdered sugar using a hand or stand mixer until the mixture is light and creamy. Add the remaining lemon juice and zest, heavy cream, vanilla extract, and a pinch of salt.
- Assemble the cake: Place a small dab of frosting in the center of your cake plate to keep the first layer from sliding. If you want clean edges, tuck parchment paper strips around the edges of the plate. Place the first cake layer on the plate and spread a generous layer of frosting on top. Add the second layer, frost it, then add the third layer. Frost the top and sides of the cake, smoothing it out with a spatula.
- Garnish and serve: Decorate the top of the cake with the remaining fresh blueberries, thin lemon slices, and a sprinkle of extra lemon zest. Remove the parchment strips if you used them, and serve immediately.
Substitutions and Variations
Here are a few simple swaps and add-ins to make this cake your own.
Cake mix: Use lemon cake mix instead of vanilla for even more lemon flavor. You can also make the cake from scratch if you prefer.
Blueberries: Frozen blueberries work, but thaw and drain them first, then pat them dry with paper towels. Raspberries or blackberries also work beautifully.
Lemon juice: Bottled lemon juice can be used in a pinch, but fresh lemon juice tastes brighter and more vibrant.
Heavy cream: Swap it for milk or half-and-half if that's what you have. The frosting will be slightly less rich but still delicious.
Make it lighter: Use a sugar-free cake mix and reduce the powdered sugar in the frosting for a lower-sugar version.
Add more lemon: Stir a tablespoon of lemon curd into the frosting for an extra tangy, creamy layer.
Make cupcakes: Divide the batter into lined muffin tins and bake for 15 to 18 minutes for lemon blueberry cupcakes.
Equipment
Here's what makes this recipe come together smoothly.
- Three 9-inch cake pans: For baking the layers evenly.
- Cooking spray and parchment paper: Prevents the cakes from sticking.
- Mixing bowls: For the batter and frosting.
- Hand or stand mixer with whisk attachment: Makes the frosting light and fluffy.
- Wire cooling rack: Lets the cakes cool evenly without getting soggy on the bottom.
- Measuring cups and spoons: For accurate ingredient amounts.
- Cake spatula: For spreading the frosting smoothly.
How to Store Lemon Blueberry Cake
This cake stores well and stays moist for several days.
Room temperature: Store the frosted cake in an airtight container or under a cake dome for up to 2 days. The buttercream keeps it fresh and moist.
Refrigerator: Store in the fridge for up to 5 days. Let the cake sit at room temperature for about 30 minutes before serving so the frosting softens.
Freezer: Wrap unfrosted cake layers tightly in plastic wrap, then in foil, and freeze for up to 3 months. Thaw in the fridge overnight before frosting. You can also freeze the whole frosted cake, but let it firm up in the freezer first, then wrap it well.
Serving Suggestions
This cake is beautiful on its own, but here are a few ways to make it even more special.
- Serve it with a scoop of vanilla ice cream or a dollop of whipped cream.
- Drizzle lemon curd or blueberry sauce over each slice for extra flavor.
- Pair it with a hot cup of tea or coffee for a cozy afternoon treat.
- Add fresh mint leaves as a garnish for a pop of color and freshness.
If you're planning a spring or summer gathering, this pairs wonderfully with my Olivier Potato Salad or Pork and Sauerkraut for a complete, comforting meal.
Expert Tips
Here's what I've learned after making this cake many times.
Use room-temperature butter: Cold butter won't cream properly, and the frosting will be lumpy. Let it sit out for 30 minutes before you start.
Don't skip the flour coating: Tossing the blueberries in flour keeps them from sinking to the bottom of the pans. It's a small step that makes a big difference.
Cool the cakes completely: Frosting warm cakes will cause the buttercream to melt and slide off. Be patient and let them cool all the way.
Level the cakes if needed: If the tops are domed, use a serrated knife to trim them flat so the layers stack evenly.
Chill the frosted cake: After assembling, chill the cake in the fridge for 15 to 20 minutes to set the frosting before adding the garnish.
Use fresh lemon: Fresh lemon juice and zest make a noticeable difference in flavor. Bottled juice just doesn't taste the same.
Add extra frosting: If you love lots of frosting, double the frosting recipe for thicker layers and more to spread on the sides.
FAQ
Yes! Fresh Lemon Blueberry Cake work beautifully in lemon cake. Toss them in a little flour before folding them into the batter to keep them from sinking to the bottom while the cake bakes.
Absolutely. Just fold them gently into the batter after you've mixed everything else. Sponge cakes are delicate, so be gentle to avoid deflating the batter.
Lemon's bright, tangy flavor balances the natural sweetness of blueberries perfectly. The acidity of the lemon also enhances the blueberry flavor, making both taste more vibrant and fresh.
All-purpose flour is the best choice. It gives the cake structure without making it too dense. If you want a lighter texture, you can use cake flour, but all-purpose works perfectly for this recipe.
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Pairing
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Lemon Blueberry Cake
Ingredients
Method
- Preheat oven to 350°F (175°C). Grease three 9-inch cake pans with cooking spray and line with parchment paper.
- Prepare cake mix according to package directions, stirring in juice and zest of 1 lemon.
- In a small bowl, toss 1 cup blueberries with 3 tablespoon flour until coated. Gently fold into cake batter.
- Divide batter evenly among prepared pans and bake 18–20 minutes, or until a toothpick inserted comes out clean.
- Let cakes cool in pans for 10 minutes, then invert onto wire racks to cool completely. prep
- For frosting, beat softened butter and 2 ½ cups powdered sugar using a hand or stand mixer. Add remaining lemon juice and zest, heavy cream, vanilla, and salt; beat until combined. Optionally add remaining ½ cup powdered sugar to adjust texture.
- Place a dab of frosting on cake plate to secure first layer; use parchment strips on sides to prevent mess. Place first cake layer and top with frosting. Repeat with second and third layers, covering top and sides with remaining frosting.
- Garnish with remaining blueberries, thin lemon slices, and lemon zest before serving.
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