Moist Lemon Blueberry Layer Cake with Lemon Buttercream

This moist lemon blueberry cake is a stunning two-layer showstopper made entirely from scratch with fresh blueberries, real lemon juice, and tangy buttermilk for the softest crumb imaginable. Each layer is generously frosted with a silky lemon buttercream frosting that's bright, fluffy, and perfectly balanced - not too sweet, not too tart. Easy from-scratch recipe - perfect for spring birthdays, Easter, or brunch!

Ideal for beginners looking to impress family and friends, just like Lemon Curd Cake and 2 Ingredient Lemon Bars.

If you love of lemon desserts as much as I do, be sure to also try  and No Bake Creamy Lemon Delight and Swirl Lemon Bars.

For blueberry desserts fans, I recommend Blueberry Crumble Cheesecake, Creamy Blueberry Cheesecake and Blueberry Cream Cheese Pastries.

Moist Lemon Blueberry Cake from Scratch

This Easy Lemon Blueberry Cake is mouthwatering and oh so delicious, it's also simpler to make than you'd think, and so very pretty with the colors of blueberries and lemon.

Made entirely from scratch, this cake has 2 layers of light and fluffy lemon cake swirled with a mix of fresh blueberries and topped with lemony perfection frosting. Every bite is layered with fresh berries, hints of lemon, and filled with creamy buttercream. It's so moist, just perfectly sweet, and has a hint of lemon flavor throughout.

The secret is a combination of buttermilk, fresh lemon zest, and real lemon juice folded right into the batter, along with a full cup and a half of plump blueberries that burst in every bite. It's topped with a dreamy lemon buttercream frosting that's bright, creamy, and absolutely irresistible.

Whether you're making this for a spring birthday, Easter brunch, or just because you love the lemon-blueberry combination, this easy lemon blueberry cake from scratch will become your go-to layer cake all season long.

If you love the lemon-blueberry combination as much as we do, don't miss this Lemon Blueberry Cheesecake with Fresh Blueberry Swirl - it uses the same bright, from-scratch blueberry swirl flavor profile in a creamy baked cheesecake.

Why You'll Love This Lemon Blueberry Cake

This isn't a cake that relies on box mix shortcuts, or artificial lemon flavor. Every element - the batter, the blueberry distribution, the frosting - is built with intention, and the result is a layer cake that tastes as impressive as it looks.

Made Completely From Scratch: From the cake layers to the lemon buttercream, everything here is homemade - and it's easier than you think. Real lemon zest and fresh lemon juice go directly into the batter, which means the lemon flavor isn't just a top note; it runs through every single bite.

Buttermilk for an Extra-Moist Crumb: Buttermilk is the ingredient that separates a forgettable cake from one people ask you to make again. Its natural acidity tenderizes the gluten in the batter, producing a soft, velvety crumb that stays moist for days - not just the hour after it comes out of the oven. It also reacts with the leavening agents to give the cake layers a reliable, even rise with no dense spots or dry edges.

Perfect for Spring and Summer Entertaining: Lemon and blueberry is one of those flavor combinations that belongs to the warmer months - bright, floral, and just tart enough to feel refreshing. This cake holds up beautifully at room temperature for a few hours, making it ideal for Easter brunch tables, Mother's Day spreads, or a backyard birthday where the dessert needs to look stunning without demanding last-minute attention.

Ingredients for Moist Lemon Blueberry 2-Layer Cake

This is an overview of ingredients and why you need each one. Measurements and printable ingredient list are in the recipe card below.

• Butter: Always softened to room temperature so it's easy to mix and to keep the cake nice and tender.
• Buttermilk: The key to a moist cake. I also used buttermilk in my Blueberry Scones.
• Sugar: both regular granulated and powdered sugar to add sweetness and a little extra moisture to the cake batter and the frosting.
• Eggs: Have 4 large ones ready at room temperature-they help hold everything together and make the cake rise.
• Vanilla extract: Don't forget a splash of pure vanilla extract for some subtle flavor in the frosting-just about a tablespoon altogether.
• Dry ingredients: On the dry side, you'll use 3 cups of all-purpose flour, plus a teaspoon or two of baking powder and a pinch of baking soda and salt to give the cake a good lift and balance the flavors.
• Liquid ingredients: To make the cake moist and flavorful, you'll add buttermilk, lemon zest , and the fresh lemon juice.
• Berries: Of course, fresh blueberries are a must-about 1 ½ cups-to get those juicy bursts of flavor. To keep the blueberries from sinking, toss them with a tablespoon of flour before folding them into the batter.
• For cream cheese frosting: Cream cheese and butter, both softened, plus a few cups of powdered sugar for sweetness, heavy cream to make it creamy, vanilla extract, and just a pinch of salt to cut through the sweetness.
• Buttercream frosting: Made with just a few simple ingredients that come together to create a smooth, creamy topping for your blueberry lemon cake. It starts with soft butter, which is whipped until smooth and fluffy. Then powdered sugar is added gradually to sweeten and thicken the mixture. A splash of vanilla extract adds even more flavor, while a tiny pinch of salt balances the sweetness.

How to Make Easy Lemon Blueberry Cake

When it comes to making cake batter I like to keep my cake recipes pretty straightforward by illustrating the baking process with photos. The actual recipe with measurements is in the recipe card.

1. Mix Dry Ingredients

In a medium bowl, whisk together the flour, baking powder, and salt. Set aside.

Process or blend granulated sugar with lemon zest until the mixture is pale yellow and fragrant. This mixture is your "lemon sugar".

After I process sugar and lemon zest for about 30-60 seconds, I combine it with the softened butter until smooth and slightly fluffy. This is your "creamed lemon sugar".

Add the eggs one at a time, mixing well after each addition

2. Make the Cake Batter

Gradually stir the dry ingredients into the butter mixture. Before fully combined, add buttermilk and fresh lemon juice. Mix just until incorporated.

Toss blueberries with a bit of flour to prevent sinking.

Mix blueberries with batter: Gently fold blueberries into the batter.

3. Bake and Cool the Cake Layers

Evenly distribute the batter between the prepared pans and smooth the tops. Bake until the cakes are golden and a toothpick inserted comes out with moist crumbs.

Cool the cakes in the pans briefly before transferring to a wire rack to cool completely.

Make Frosting

I have 2 beautiful and delicious frosting options for you to choose from:

1. Lemon Buttercream Frosting
2. Cream Cheese Frosting

1. How to Make Lemon Buttercream Frosting

If you choose to make lemon buttercream frosting, it's a pretty straightforward recipe as well.

Add the softened butter to a stand mixer and beat on medium-high for 2-3 minutes until pale and creamy - don't rush this step; fully creamed butter is the foundation of a fluffy frosting.

Add powdered sugar one cup at a time with the mixer on low to avoid a sugar cloud, then increase speed once incorporated. Add lemon juice one tablespoon at a time, tasting as you go, until the frosting is bright and tangy without being sharp.

A pinch of salt and a splash of vanilla out the sweetness and make the lemon flavor pop. If the frosting feels too stiff, add heavy cream one teaspoon at a time; if it's too loose, add powdered sugar a tablespoon at a time until it holds a soft peak.

2. How to Make Cream Cheese Frosting

Cream Cheese frosting is soft and fluffy and is a beautiful way to frost your lemon blueberry cake!

Using a handheld mixer, beat cream cheese, lemon juice and butter together on medium speed until no lumps remain, about 3 minutes.

Add powdered sugar, heavy cream, vanilla extract, and salt with the mixer running on low. Turn mixer up to high speed and beat for 3 minutes.

Assemble and Frost the Layer Cake

1. Anchor the first layer before you start

Place a small dollop of buttercream directly on your cake board or plate before setting down the first layer - this acts as glue and prevents the cake from sliding while you frost.

Pro Tip: You can set the first layer cut-side up so the flat surface faces the frosting.

2. Use an offset spatula and don't skimp on the filling layer

Spread a generous, even layer of lemon buttercream - about ¾ to 1 cup - across the top of the first layer all the way to the edges. This is your flavor payoff between bites; a thin filling layer is the most common reason a slice tastes underwhelming.

3. Finish with the final coat at room temperature

Once you added the second cake layer, apply the remaining buttercream in smooth, even strokes using a bench scraper for the sides and an offset spatula for the top. Work quickly - lemon buttercream softens fast in a warm kitchen.

Garnish with fresh blueberries, thyme sprigs, and a dusting of powdered sugar.

Fresh or Frozen Blueberries- Which is Better?

Fresh OR frozen blueberries can be used in this cake, but don't thaw the frozen blueberries before using. Thawing frozen blueberries can cause them to bleed their juice, which can change the color and texture of your cake batter and potentially make the cake soggy.

Tossing the blueberries with a bit of flour helps them not to sink while baking. The flour makes the blueberries stick to the batter, helping them defy gravity and stay put.

If you have extra blueberries on hand, put them to work in these Flaky Blueberry Hand Pies - a buttery, jammy dessert that comes together with minimal effort.

Tips for the Best Lemon Blueberry Cake from Scratch

Toss your blueberries in flour before folding them in.
A light coating of flour keeps blueberries suspended in the batter instead of sinking to the bottom of the pan. Use about one tablespoon of your measured flour, toss the berries just before adding them, and fold gently - overmixing breaks them open and turns your batter purple.

Don't skip the room-temperature ingredients.
Cold butter won't cream properly, and cold eggs can cause the batter to seize and curdle. Pull your butter, eggs, and buttermilk out at least 45 minutes before you start - this single step is responsible for the smooth, even batter that produces a level, fine-crumbed cake.

Zest your lemons before you juice them.
Once a lemon is juiced it's nearly impossible to zest cleanly - always zest first. Use a Microplane and stop zesting when you hit the white pith, which is bitter and will dull the bright citrus flavor you're building.

Measure your flour by weight, not volume.
A packed cup of flour can weigh up to 50% more than a properly spooned one, and too much flour is the leading cause of a dense, dry cake. If you don't have a kitchen scale, spoon the flour into your measuring cup and level it off - never scoop directly from the bag.

Let your cake layers cool completely before frosting.
Even slightly warm cake layers will melt your lemon buttercream on contact, causing it to slide and pool instead of holding its shape. Cool the layers on a wire rack for at least one hour at room temperature, or speed the process by refrigerating them for 20 minutes before assembling.

Use cold butter for the buttercream, not softened.
Unlike cake batter, lemon buttercream benefits from slightly cool butter - it whips up fluffier and holds its structure better at room temperature. If your kitchen is warm, refrigerate the finished frosting for 10 minutes before spreading to keep it from becoming too loose to stack cleanly.

Runny buttercream is a temperature problem, not a recipe problem. If your kitchen is warm or your butter was too soft, refrigerate the frosting for 10-15 minutes and re-whip before spreading. Adding powdered sugar to fix it works, but risks making the frosting overly sweet - chilling is always the better first move.

Your cake sinks in the middle if the oven runs hot or the door is opened too early. Use an oven thermometer - most home ovens run 25°F off - and resist opening the door until the minimum bake time has passed. The structure of the cake sets in the last 5 minutes of baking; disrupting that with a temperature drop is the most common cause of a sunken center.

A dry cake almost always comes down to overbaking or mismeasured flour. Pull the cake when a toothpick comes out with just a few moist crumbs - not wet batter, but not bone dry either. If you're scooping flour directly from the bag, you're likely packing in 20-30% more than the recipe intends.

FAQ

• Can I make this cake ahead of time? Definitely. Bake and cool the layers a day ahead for an Easter Brunch. Wrap well and store at room temp. Frost the next day. If you're planning a spring brunch spread, these Lemon Ricotta Pancakes with Blueberries make the perfect companion - light, fluffy, and ready in 20 minutes.
• Can I freeze buttermilk lemon cake? Yes, unfrosted cake layers can be frozen for up to 2 months. Wrap tightly and thaw before frosting.
• No food processor? No worries! Rub lemon zest into the sugar with your fingers until it's fragrant and slightly moist.
• Can I Make This Lemon Blueberry Cake Gluten-Free? Yes - swap the all-purpose or cake flour 1:1 with a high-quality gluten-free baking flour blend, and the cake will bake up nearly identical in texture and flavor. Look for a blend that already contains xanthan gum (Bob's Red Mill 1-to-1 and King Arthur Measure for Measure both work well here). Everything else in the recipe - the buttermilk, lemon juice, blueberries, and lemon buttercream - is naturally gluten-free, so no other substitutions are needed.

Substitutions and Variations

• Buttermilk: Mix milk with a teaspoon of vinegar or lemon juice, let it sit for 5 minutes.
• Blueberries: Frozen blueberries can be used; thaw and drain them well before folding in.
• Different berries: Swap peaches or raspberries for blueberries.
• Adjust sweetness by reducing sugar slightly if you prefer less sweet frosting.

Storage and Leftovers

• For short-term storage, just place the lemon blueberry cake in an airtight container or cover it well with plastic wrap or foil. Then, keep it in the refrigerator. This helps the cake stay moist while keeping the frosting fresh. When you're ready to eat it again, you can bring it to room temperature for the best flavor and texture.
• If you want to keep the cake longer, freezing is a great option. You can freeze the cake layers before frosting, or freeze the whole frosted cake. To freeze unfrosted layers, wrap each one tightly in plastic wrap and then in foil or a freezer-safe bag to protect it from freezer burn. Frozen layers will keep well for up to 2 months. When you want to enjoy the cake, thaw the layers overnight in the refrigerator, then frost as usual.
• Freezing a fully frosted cake is a bit trickier but still doable. Wrap the whole cake tightly in plastic wrap, followed by a layer of foil, and freeze. When ready to serve, thaw it slowly in the fridge overnight to avoid water condensation that can soften the frosting.
• For the frosting, if you have leftovers, store it in an airtight container in the fridge for up to about a week. Before spreading or piping again, bring it back to room temperature and give it a quick stir or re-whip to restore its creamy texture.

More Lemon and Blueberry Desserts

• Blueberry Cream Cheese Pastries
• Peach and Blueberry Puff Pastry Tart
• No Bake Creamy Lemon Pudding Pie
• Creamy Blueberry Cheesecake with Blueberry Sauce