Easy Lemon Blueberry Sheet Cake with Zesty Glaze

This Lemon Blueberry Sheet Cake is the kind of dessert that feels light, refreshing, and incredibly satisfying all at once. The combination of tangy lemon and sweet, juicy blueberries creates a perfectly balanced flavor that’s bright without being overpowering. Each bite delivers a soft, moist crumb with bursts of berries and a smooth citrus glaze that ties everything together beautifully. It’s a simple yet elegant dessert that works for any occasion, from casual gatherings to special celebrations.

What makes this cake especially loved is its texture and ease. The batter is rich yet fluffy, thanks to ingredients like butter, eggs, and buttermilk, while fresh lemon juice and zest provide that vibrant citrus punch. Blueberries are gently folded into the batter to prevent sinking and ensure even distribution throughout the cake. The final touch—a glossy lemon glaze—adds sweetness and enhances the overall flavor, making this cake both visually appealing and incredibly delicious.

Ingredients

• 2 ½ cups all-purpose flour
• 2 tsp baking powder
• ½ tsp baking soda
• ½ tsp salt
• 1 cup unsalted butter (room temperature)
• 1 ¾ cups granulated sugar
• 3 large eggs (room temperature)
• 1 tbsp vanilla extract
• 1 cup buttermilk
• ¼ cup fresh lemon juice
• 1 tbsp lemon zest
• 2 cups fresh blueberries
• 2 tbsp flour (for coating blueberries)

Lemon Glaze

• 2 cups powdered sugar
• 3–4 tbsp fresh lemon juice
• 1 tsp lemon zest

Equipments

• 9×13-inch baking pan
• Mixing bowls (large and medium)
• Electric mixer or hand whisk
• Rubber spatula
• Measuring cups and spoons
• Zester or grater
• Cooling rack

Instructions

• Preheat oven to 350°F (175°C). Grease your baking pan and line with parchment paper for easy removal.
• In a medium bowl, whisk together flour, baking powder, baking soda, and salt. Set aside.
• In a large bowl, beat butter and sugar together for 3–4 minutes until light and fluffy. This step helps create a soft texture.
• Add eggs one at a time, mixing well after each addition.
• Stir in vanilla extract, lemon juice, and lemon zest for fresh citrus flavor.
• Add half of the dry ingredients into the wet mixture and mix gently.
• Pour in buttermilk and mix until combined.
• Add remaining dry ingredients and fold gently to avoid overmixing.
• Toss blueberries with 2 tablespoons flour to prevent them from sinking during baking.
• Gently fold blueberries into the batter using a spatula.
• Pour batter into prepared pan and spread evenly.
• Tap the pan lightly to remove air bubbles.
• Bake for 40–45 minutes or until a toothpick inserted comes out with moist crumbs.
• Remove from oven and let cool completely in the pan.
• Prepare glaze by mixing powdered sugar, lemon juice, and zest until smooth.
• Pour glaze evenly over the cooled cake.
• Allow glaze to set for 10–15 minutes.
• Slice into squares and serve.

Recipe Information

• Prep Time: 20 minutes
• Bake Time: 40–45 minutes
• Total Time: 1 hour 5 minutes
• Servings: 12–15 slices
• Cuisine: American
• Course: Dessert

Nutrition Information (Approximate)

• Calories: 360 kcal
• Protein: 5 g
• Carbohydrates: 48 g
• Fat: 16 g
• Fiber: 2 g
• Sugar: 32 g
• Sodium: 180 mg

Flavor Profile Breakdown

• Bright citrus tang from fresh lemon
• Sweet bursts of juicy blueberries
• Soft, buttery cake base
• Smooth and slightly tart glaze
• Balanced sweetness with refreshing finish

Tips for Best Results

• Use fresh lemon juice instead of bottled
• Coat blueberries with flour before mixing
• Do not overmix batter
• Use room temperature ingredients
• Let cake cool fully before glazing

Variations & Substitutions

• Use frozen blueberries (do not thaw)
• Replace buttermilk with yogurt or sour cream
• Add white chocolate chips for richness
• Use lemon extract for stronger citrus flavor
• Make cupcakes by adjusting baking time

Mistakes to Avoid

• Overbaking the cake
• Skipping blueberry coating step
• Adding glaze to warm cake
• Overmixing batter
• Using too much liquid

Serving Suggestions

• Serve with tea or coffee
• Garnish with fresh blueberries and lemon slices
• Add whipped cream on the side
• Dust lightly with powdered sugar

Storage Tips

• Store in airtight container at room temperature for 2 days
• Refrigerate up to 5 days
• Bring to room temperature before serving
• Freeze slices up to 2 months

Why You’ll Love This Recipe

• Easy one-pan dessert
• Perfect balance of sweet and tangy
• Soft and moist texture
• Great for gatherings
• Visually appealing

How to Serve

• Slice into neat squares
• Serve slightly chilled or at room temperature
• Add extra glaze drizzle if desired
• Pair with a refreshing drink

FAQs

Can I use frozen blueberries?
Yes, just add them directly without thawing to prevent excess moisture.

Why coat blueberries with flour?
It helps keep them evenly distributed instead of sinking.

Can I make this cake ahead of time?
Yes, it stays moist and flavorful for a couple of days.

What can I use instead of buttermilk?
You can use milk mixed with a little lemon juice or vinegar.

How do I make the glaze thicker?
Add more powdered sugar to adjust consistency.

Why is my cake dense?
Overmixing or too much flour can cause density.

Can I add frosting instead of glaze?
Yes, cream cheese frosting pairs well.

How do I store leftovers?
Keep in an airtight container in the fridge.

Can I use lemon extract?
Yes, it enhances the citrus flavor.

Is this cake very sweet?
It has a balanced sweetness with a slight tang.