Lemon Blueberry Sheet Cake

Bright, zesty, and bursting with sweet blueberries, this Lemon Blueberry Sheet Cake is the perfect dessert for summer gatherings, birthdays, or whenever you need a quick citrusy treat. Baked in a 9×13-inch pan and topped with a tangy lemon glaze, it’s easy to serve, easy to love, and hard to resist.

Why You’ll Love This Recipe

• One-pan wonder: Minimal mess, maximum flavor
• Light, tender crumb with juicy blueberries throughout
• The lemon glaze adds the perfect sweet-tart finish
• Perfect for picnics, potlucks, or everyday dessert
• Stays moist and delicious for days

Ingredients

For the Cake:

• 3 cups all-purpose flour
• 2 teaspoons baking powder
• 1/2 teaspoon baking soda
• 1 1/4 teaspoons salt
• 1 cup butter (2 sticks), softened
• 1 1/2 cups granulated sugar
• Juice and zest of 2 lemons (about 1/4 cup lemon juice)
• 4 large eggs
• 1 cup buttermilk
• 2 teaspoons vanilla extract
• 1 1/2 cups fresh blueberries, tossed with 1 tablespoon flour

Glaze:

• 2 1/2 cups powdered sugar
• 1/3 cup lemon juice

Directions

Preheat and Prepare the Pan

1. Preheat your oven to 350°F (175°C).
2. Grease a 9×13-inch baking dish and line it with parchment paper, leaving an overhang on the long sides for easy removal later.

Mix Dry Ingredients

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

Cream Butter and Sugar

4. In a stand mixer fitted with the paddle attachment (or using a hand mixer), cream together the butter and granulated sugar on medium speed until light and fluffy—about 3–4 minutes.

Add Wet Ingredients

5. Add the eggs, one at a time, mixing well after each addition.
6. Pour in the vanilla extract, then add the buttermilk, mixing on low speed until just combined.
7. Mix in the lemon juice and zest.

Combine Dry and Wet

8. Gradually add the dry ingredients into the wet ingredients and mix until no streaks of flour remain.
9. Gently fold in the blueberries tossed in flour with a spatula, being careful not to overmix.

Bake

10. Pour the batter into the prepared pan and smooth out the top.
11. Bake for 40–45 minutes, or until a toothpick inserted into the center comes out with moist crumbs.
12. Let the cake cool completely in the pan on a wire rack.

Glaze

13. In a small bowl, whisk together the powdered sugar and lemon juice until smooth and pourable.
14. Pour the glaze over the cooled cake and spread it evenly.
15. Allow the glaze to set completely before slicing and serving.

Pro Tips and Variations

• Tossing the blueberries in flour helps prevent them from sinking during baking
• You can substitute frozen blueberries (no need to thaw)
• Add 1 teaspoon of almond extract for a flavor twist
• For a thicker glaze, use slightly less lemon juice
• Top with extra blueberries or lemon zest for a pretty presentation

Serving Suggestions

• Serve with a dollop of whipped cream or Greek yogurt
• Pair with iced tea or lemonade for a summer-ready dessert
• Cut into small squares for picnic-style finger desserts
• Serve chilled for an extra refreshing bite

Storage/Reheating

• Room Temp: Store covered at room temperature for up to 3 days
• Refrigerator: Store covered in the fridge for up to 5 days
• Freezer: Wrap tightly and freeze for up to 2 months. Thaw in the fridge overnight
• Best served at room temperature or slightly chilled

FAQs

Can I use bottled lemon juice?
Fresh juice is highly recommended for flavor, but bottled can work in a pinch.

Can I double the recipe?
Yes! Bake in two 9×13 pans or a sheet pan; adjust baking time accordingly.

Can I make this dairy-free?
Use dairy-free butter and almond or oat milk mixed with lemon juice in place of buttermilk.

Can I make it gluten-free?
Yes! Use a 1:1 gluten-free flour blend. Texture may vary slightly.

Conclusion

This Lemon Blueberry Sheet Cake is a zesty, moist, and fruit-filled dessert that’s as easy to make as it is to devour. It’s perfect for summer celebrations, quick family desserts, or anytime you’re craving a lemony treat. With a tangy glaze and bursting blueberries, it’s guaranteed to brighten your day.

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