As the sun shines brighter and summer festivities beckon, I find myself reaching for my trusty mixing bowl, ready to whip up something that sings with sunshine. Enter the Lemon Blueberry Sheet Cake, a dessert that perfectly captures that vibrant spirit with its refreshing burst of zesty lemon mingling with sweet, juicy blueberries. This easy-to-make cake isn’t just a treat; it’s a crowd-pleaser that invites everyone to gather, making it the ideal companion for BBQs and family picnics. Plus, it’s customizable—switch out the blueberries for raspberries or strawberries to suit your taste! Ready to add a slice of summer fun to your table? Let’s dive into this delightful recipe together!

Why is this cake a summer favorite?
Easy to Make: This Lemon Blueberry Sheet Cake requires minimal baking skills, ensuring success even for beginner bakers looking to impress at their next gathering.
Refreshing Flavor: The bright acidity of lemon perfectly balances the sweetness of blueberries, creating a flavor explosion that’s like summer on a plate.
Customizable: Feel free to swap blueberries for other fruits like raspberries or strawberries, giving you endless options to suit your taste.
Visual Appeal: With its vibrant colors and glossy lemon glaze, this cake is a showstopper, perfect for BBQs or family celebrations. Serve it alongside some homemade Free Lemon Blueberry muffins or a rich slice of Autumn Pumpkin Cake for a delightful dessert table.
Crowd-Pleasing Dessert: Its tenderness and flavor make it a hit with everyone, from kids to adults, ensuring there’s never a crumb left behind!
Lemon Blueberry Sheet Cake Ingredients
For the Cake
- All-purpose flour – Provides structure to the cake; can use gluten-free flour blend for a gluten-free version.
- Baking powder – A leavening agent to help the cake rise.
- Baking soda – Enhances the texture for a light and fluffy cake.
- Salt – Balances sweetness and enhances overall flavors.
- Butter (softened) – Adds rich moisture; ensure it’s at room temperature for better creaming.
- Granulated sugar – Sweetens the cake perfectly to balance the tartness of the lemon.
- Lemon juice and zest – Infuses the cake with zesty brightness; always use fresh lemons for the best flavor.
- Eggs – Provides moisture and binding; room temperature eggs mix in smoothly.
- Buttermilk – Helps create a tender crumb; for a quick substitute, combine milk with a tablespoon of lemon juice or vinegar.
- Vanilla extract – Enhances the overall flavor profile.
- Fresh blueberries – Bursting with juiciness; toss with a bit of flour before adding to prevent sinking.
For the Glaze
- Powdered sugar – Creates a sweet glaze that adds a delightful finish.
- Additional lemon juice – Brightens the glaze, enriching the overall lemon flavor in your Lemon Blueberry Sheet Cake.
Step‑by‑Step Instructions for Lemon Blueberry Sheet Cake
Step 1: Preheat the Oven and Prepare the Pan
Begin by preheating your oven to 350°F (175°C). While the oven heats, grease a 9×13-inch baking dish with butter or cooking spray and line the bottom with parchment paper for easy removal later. This preparation helps ensure your Lemon Blueberry Sheet Cake bakes evenly and releases effortlessly once it’s done.
Step 2: Mix the Dry Ingredients
In a large mixing bowl, whisk together the all-purpose flour, baking powder, baking soda, and salt until blended. This step helps distribute the leavening agents evenly throughout the flour, setting the foundation for a light and fluffy cake. Set the bowl aside while you get ready to cream the butter and sugar.
Step 3: Cream the Butter and Sugar
Using an electric mixer, cream the softened butter and granulated sugar in a separate bowl until the mixture is light and fluffy, about 3-4 minutes. This aeration process is crucial for achieving a tender texture in your Lemon Blueberry Sheet Cake. Scrape down the sides of the bowl halfway through to ensure all ingredients are well combined.
Step 4: Incorporate the Wet Ingredients
Add the room temperature eggs, vanilla extract, and buttermilk to the creamed mixture. Mix on medium speed until everything is fully combined and smooth, which should take about 1-2 minutes. The buttermilk adds moistness and richness to the cake, enhancing its overall flavor and crumb.
Step 5: Combine Dry and Wet Ingredients
Gradually add the dry ingredient mixture to the wet ingredients, mixing on low speed until just combined. Be cautious not to overmix—stop when no flour streaks remain. This ensures your Lemon Blueberry Sheet Cake will be tender rather than dense, giving it that perfect lightness.
Step 6: Add Lemon Zest and Blueberries
Gently fold in the freshly squeezed lemon juice and zest, which will infuse the batter with vibrant flavor. Next, carefully fold in the blueberries that have been tossed with a bit of flour—this minimizes sinking during baking. Take your time to combine everything without overworking the batter.
Step 7: Bake the Cake
Pour the batter into your prepared baking dish, smoothing it out evenly with a spatula. Place it in the preheated oven and bake for 40 to 45 minutes, or until a toothpick inserted in the center comes out clean with a few moist crumbs attached. Keep an eye on it towards the end to avoid overbaking.
Step 8: Cool and Glaze the Cake
Once baked, remove the Lemon Blueberry Sheet Cake from the oven and allow it to cool in the pan for about 15 minutes. Afterward, carefully transfer it to a wire rack to cool completely. While it’s cooling, whisk together the powdered sugar and additional lemon juice to create a smooth glaze. Drizzle it over the cooled cake and let it set before slicing.

What to Serve with Lemon Blueberry Sheet Cake?
As you celebrate summer with this delightful dessert, consider these fantastic companions that elevate your dining experience.
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Fresh Whipped Cream: A dollop of lightly sweetened whipped cream adds a luscious creaminess that complements the tangy citrus flavors.
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Minty Fruit Salad: A vibrant mix of seasonal fruits, spiked with fresh mint, balances the cake’s sweetness and adds a refreshing contrast.
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Lemonade Spritzer: A cool and bubbly lemonade spritzer brings a fizzy flair to your dessert table, harmonizing beautifully with the cake’s lemony notes.
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Vanilla Ice Cream: A scoop of vanilla ice cream melts into the warm cake, creating a decadent treat that enhances its flavors.
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Blueberry Compote: Drizzling homemade blueberry compote over each slice intensifies the blueberry experience while adding a sweet-tart element.
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Coffee or Iced Tea: Serve with a cup of freshly brewed coffee or a refreshing iced tea for a charming pairing that perfectly matches the cake’s citrusy charm.
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Chocolate Drizzle: Add a drizzle of chocolate sauce on top for an unexpected twist, creating a delightful contrast to the lemon’s brightness.
Each of these pairings adds a layer of excitement, turning your dessert into a full-fledged celebration!
Tips for the Best Lemon Blueberry Sheet Cake
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Room Temperature Ingredients: Ensure your butter, eggs, and buttermilk are at room temperature; this helps create a smooth batter for your Lemon Blueberry Sheet Cake.
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Avoid Overmixing: Mix your batter just until combined to avoid a dense cake. Overmixing can lead to a tough texture, so be gentle!
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Toss Blueberries in Flour: Prevent your blueberries from sinking by tossing them in a bit of flour before folding them into the batter. This simple step helps keep them evenly distributed.
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Use Fresh Ingredients: Fresh lemons yield the best flavor for both the cake and glaze. Don’t be tempted by bottled lemon juice—real zest makes a world of difference!
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Storage Best Practices: To keep your Lemon Blueberry Sheet Cake fresh, store it in an airtight container in the refrigerator for up to 5 days. This helps retain its moisture and flavor.
Lemon Blueberry Sheet Cake Variations
Feel free to let your creativity shine and customize this delightful cake with these fun variations.
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Gluten-Free: Substitute all-purpose flour with a gluten-free flour blend, ensuring everyone can enjoy this sweet treat.
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Nutty Twist: Add chopped walnuts or pecans to the batter for a crunchy texture that pairs beautifully with the soft cake.
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Berry Medley: Swap blueberries for a mix of raspberries and chopped strawberries, adding vibrant color and tartness.
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Citrus Burst: Enhance the lemon flavor by mixing in grated orange zest along with the lemon zest for a bright, citrusy finish.
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Spiced Up: Introduce a sprinkle of cinnamon or nutmeg to the batter, giving your cake a warm, cozy flavor.
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Lemon-Lime Delight: Mix lemon juice with lime juice for a tropical twist that adds extra tang and brightness to each slice.
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Cream Cheese Frosting: Top with a swirl of cream cheese frosting instead of glaze for a rich, creamy finish that complements the zest.
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Freezing For Later: Consider making smaller cakes or cupcakes and freezing them; perfect for spontaneous summer gatherings or sweet cravings.
Whether you’re up for experimenting with different fruits or trying out new flavors, this Lemon Blueberry Sheet Cake accommodates all palates. Want to explore more delightful desserts? Check out these White Chocolate Cupcakes next, or serve a slice of Covered Pretzel Cupcakes for an exciting dessert spread!
How to Store and Freeze Lemon Blueberry Sheet Cake
Fridge: Store leftovers in an airtight container in the refrigerator for up to 5 days to maintain freshness and moisture.
Freezer: For longer storage, freeze slices of the Lemon Blueberry Sheet Cake wrapped tightly in plastic wrap, followed by aluminum foil, for up to 2 months.
Reheating: Thaw in the fridge overnight and reheat in the microwave for about 15-20 seconds, or enjoy it chilled for a refreshing treat.
Make-Ahead: Bake the cake a day in advance and glaze just before serving to keep it looking beautiful and fresh!
Make Ahead Options
These Lemon Blueberry Sheet Cakes are perfect for busy home cooks looking to save time! You can prepare the batter up to 24 hours in advance; simply mix and store it covered in the refrigerator. Ensure your blueberries are tossed in flour before folding them into the batter to prevent sinking during baking. Alternatively, you can bake the cake a day ahead and store it wrapped at room temperature to maintain its moisture. Just glaze it with the lemon icing right before serving to keep it fresh and vibrant. This way, you can enjoy a delightful, homemade dessert with minimal effort on the day of your gathering!

Lemon Blueberry Sheet Cake Recipe FAQs
What kind of blueberries should I use for the Lemon Blueberry Sheet Cake?
Absolutely! Fresh blueberries are best for this cake, as they provide the sweetest flavor and juiciness. Look for berries that are firm, plump, and have a deep blue color. Avoid any with dark spots or a mushy texture, as they can spoil the cake’s overall taste and appearance.
How should I store leftover Lemon Blueberry Sheet Cake?
To keep your cake fresh, store leftovers in an airtight container in the refrigerator for up to 5 days. This helps to maintain the cake’s moisture. If you find yourself with more cake than you can finish, you can also freeze it. Just ensure it’s wrapped tightly to prevent freezer burn!
Can I freeze Lemon Blueberry Sheet Cake, and how?
Yes, you can freeze it! For the best results, wrap each slice tightly in plastic wrap, then cover with aluminum foil. This double-wrapping prevents freezer burn and will keep the cake fresh for up to 2 months. When you’re ready to enjoy it, thaw in the refrigerator overnight and reheat in the microwave for about 15-20 seconds, or enjoy it chilled!
What should I do if my cake is too dense?
If your Lemon Blueberry Sheet Cake turns out dense, it could be from overmixing the batter. To avoid this in the future, mix your ingredients just until everything is incorporated. Additionally, ensure that your ingredients, especially baking powder and baking soda, are fresh! A common mistake involves old leavening agents not providing enough lift.
Can I make substitutions for allergies or dietary preferences?
Very! This Lemon Blueberry Sheet Cake is quite adaptable. For a gluten-free version, use a gluten-free flour blend. If you’re concerned about dairy, substituting buttermilk with non-dairy milk mixed with a tablespoon of vinegar works wonderfully. For the eggs, you can replace each egg with 1/4 cup of unsweetened applesauce or a flax egg (1 tablespoon of flaxseed meal mixed with 2.5 tablespoons of water) for a vegan option.
Can I use frozen blueberries instead of fresh ones?
Using frozen blueberries is definitely an option! Just make sure to toss them in flour before adding them to the batter to prevent them from sinking. You may also want to add them straight from the freezer to avoid excess moisture, which can alter the texture of your cake. Enjoy experimenting!

Lemon Blueberry Sheet Cake - A Refreshing Summer Delight
Ingredients
Equipment
Method
- Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish and line with parchment paper.
- In a large mixing bowl, whisk together the flour, baking powder, baking soda, and salt.
- Cream the softened butter and granulated sugar until light and fluffy, about 3-4 minutes.
- Add eggs, vanilla extract, and buttermilk to the creamed mixture, mixing until smooth.
- Gradually add the dry ingredients to the wet ingredients, mixing on low speed until just combined.
- Gently fold in lemon juice, zest, and blueberries tossed in flour.
- Pour the batter into the prepared baking dish and bake for 40 to 45 minutes.
- Once baked, cool the cake in the pan for 15 minutes before transferring to a wire rack.
- Whisk together powdered sugar and lemon juice for the glaze and drizzle it over the cooled cake.

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