Moist Lemon Blueberry Sheet Cake – Easy, Bright & Tangy Recipe

If there’s one cake I make on repeat when warm weather hits, it’s this Lemon Blueberry Sheet Cake. It’s bright, buttery, filled with bursts of juicy blueberries, and smothered in a tangy lemon glaze. This one-bowl wonder is simple enough for casual summer gatherings but impressive enough for baby showers, brunches, or even birthdays.

Baking this cake feels like summer in a pan. The citrusy zing of lemon pairs perfectly with plump, sweet blueberries, and it’s all wrapped up in a moist, soft crumb thanks to buttermilk. Plus, it feeds a crowd—so it’s my go-to dessert when I want to make people happy without making a mess.

Why You’ll Love This Lemon Blueberry Sheet Cake

• Soft, tender crumb from buttermilk and real butter
• Bursting with lemon and blueberry flavor in every bite
• Simple to prep with everyday pantry staples
• One-pan cake for easy serving and cleanup
• Finished with a zingy lemon glaze that soaks into the top

Whether you’re baking for your family or a special occasion, this recipe makes life a little brighter.

Ingredients You’ll Need for the Cake

For the Cake:

• 3 cups all-purpose flour
• 2 teaspoons baking powder
• 1/2 teaspoon baking soda
• 1 1/4 teaspoon 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 tbsp flour

For the Glaze:

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

Tip: Tossing the blueberries in flour helps them stay suspended in the batter instead of sinking to the bottom.

How to Make Lemon Blueberry Sheet Cake

Step 1: Prep Your Pan and Oven

1. Preheat your oven to 350°F.
2. Grease a 9×13 baking dish and line it with parchment paper, leaving an overhang on the sides for easy lifting.

Step 2: Mix the Dry Ingredients

1. In a medium bowl, whisk together the flour, baking powder, baking soda, and salt.

And step 3: Cream the Butter and Sugar

1. In a stand mixer with the paddle attachment (or with a hand mixer), beat the butter and sugar until it’s light, fluffy, and creamy.

Step 4: Add the Wet Ingredients

1. Beat in the eggs one at a time.
2. Add vanilla extract, buttermilk, lemon juice, and lemon zest.
3. Mix just until combined—don’t overmix!

Step 5: Combine and Fold

1. Slowly mix the dry ingredients into the wet mixture.
2. Gently fold in the floured blueberries with a spatula.

For Step 6: Bake the Cake

1. Pour the batter into your prepared baking dish.
2. Bake for 40 to 45 minutes until a toothpick comes out with a few moist crumbs.
3. Let it cool in the pan completely before glazing.

Step 7: Make the Lemon Glaze

1. Whisk powdered sugar and lemon juice until smooth.
2. Drizzle generously over the cooled cake.
3. Let it set for at least 20 minutes before slicing.

Helpful Tips for Perfect Results

• Use room temperature butter and eggs for better texture.
• Don’t overmix once you add the flour—this keeps the cake soft.
• Always zest lemons before juicing them.
• You can use frozen blueberries—just don’t thaw them.

FAQs About Lemon Blueberry Sheet Cake

Why do lemon and blueberry go well together?
Lemon enhances the natural sweetness of blueberries and adds brightness.

Do I need to refrigerate it?
Not right away. It’s fine at room temperature for 1–2 days. After that, keep it chilled.

Can I make this cake in advance?
Yes! It stays moist for days and actually tastes better the next day.

How do I stop blueberries from sinking?
Always toss them with flour before folding into the batter.

How can I make the cake more moist?
Buttermilk is key—but you can also brush a little lemon syrup over the cake after baking.

Can I use a different fruit?
Sure! Raspberries or blackberries work well. Or try a mix!

How to Store This Cake

• Room temperature (covered): 2 days
• Fridge: Up to 5 days
• Freezer: Wrap tightly and freeze slices for up to 2 months

What to Serve with Lemon Blueberry Sheet Cake

• Whipped cream or lemon yogurt
• Fresh berries and mint
• Coffee, iced tea, or lemonade

More Recipes with Similar Vibes

• These indulgent blueberry cinnamon rolls are perfect for brunch or dessert
• If you love fruity sheet cakes, this pineapple heaven cake is a must-try
• This creamy lemon dump cake is another dreamy option for citrus lovers

My Final Thoughts

This Lemon Blueberry Sheet Cake is one of those recipes that always brings joy. It’s cozy and nostalgic but still has that bright, tangy lemon spark that feels fresh and summery.

I bake this for birthdays, barbecues, and on slow weekends just because. I hope it brings you and your family just as much happiness.

Don’t forget to pin it for later, and tag me @RitzyRecipes if you make it. I’d love to see your version!

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