Lemon Blueberry Sheet Cake

This irresistible Lemon Blueberry Sheet Cake is bright, buttery, and topped with a tangy glaze. One bowl, one pan, and it’s gone before dinner’s even cleared. Save this easy lemon blueberry cake for your next get-together.

A lemon blueberry sheet cake is a one-pan butter cake studded with fresh blueberries, brightened with lemon juice and zest, and finished with a tangy powdered sugar glaze. This recipe serves 12, delivers a tender, golden crumb with pops of juicy berry in every bite, and is perfect for potlucks, birthdays, or any afternoon you want something sweet without turning on three mixing bowls.

This lemon blueberry sheet cake has the kind of bright, bakery-worthy flavor that people remember long after brunch is over—and if you skip past it, you might miss the recipe everyone wishes they had saved first. Find more fresh brunch baking recipes before your next weekend spread feels incomplete.

Why You’ll Love This Lemon Blueberry Sheet Cake

The crumb is soft and tender, the berries burst with tartness against the sweet glaze, and the whole thing comes together in two bowls with no layers to stack or frost. It travels well, slices clean once fully cooled, and works for a crowd since one pan covers a dozen people easily. This lemon blueberry dessert also keeps its texture for days, which most sheet cakes can’t claim.

What Ingredients Do You Need for Lemon Blueberry Sheet Cake?

Ingredient Group	Ingredient	Amount	Notes
Cake	All-purpose flour	1 1/2 cups	Sifted for best texture
Cake	Baking powder	1 1/2 teaspoons	Gives the rise
Cake	Salt	1/2 teaspoon	Balances sweetness
Cake	Unsalted butter, softened	1/2 cup (1 stick)	Room temperature
Cake	Granulated sugar	1 cup	Creamed with butter
Cake	Large eggs	2	Added one at a time
Cake	Vanilla extract	1 teaspoon	Rounds out flavor
Cake	Milk	1/2 cup	Alternated with dry mix
Cake	Fresh lemon juice	1/4 cup	Brightens the batter
Cake	Lemon zest	1 tablespoon	Folded in last
Cake	Fresh or frozen blueberries	1 cup	If frozen, do not thaw
Lemon Glaze	Powdered sugar	1 1/2 cups	Whisked until smooth
Lemon Glaze	Fresh lemon juice	2-3 tablespoons	Adjust for thickness

Fresh lemon juice and zest do the real work here, so don’t swap in bottled juice if you can help it. If you’re working with frozen blueberries, toss them in straight from the freezer so they don’t bleed color into the batter. This homemade lemon blueberry sheet cake also holds up fine with a mix of fresh and frozen berries if that’s what you’ve got on hand.

How to Make Lemon Blueberry Sheet Cake Step by Step

Prepare the Batter

1. Preheat your oven to 350°F (175°C). Grease and flour a 9×13 inch baking pan.
2. In a medium bowl, whisk together the flour, baking powder, and salt. Set aside.
3. In a large bowl, using an electric mixer, cream together the softened butter and granulated sugar until light and fluffy.
4. Beat in the eggs one at a time, then stir in the vanilla extract.

Pro Tip: Cream the butter and sugar until the mixture visibly lightens in color, since that’s how you know enough air has been worked in.

Combine and Fold

5. Gradually add the dry ingredients to the wet ingredients, alternating with the milk and lemon juice, beginning and ending with the dry ingredients. Mix until just combined. Do not overmix.
6. Gently fold in the lemon zest and blueberries.

Pro Tip: Stop mixing the moment you no longer see streaks of flour, since overmixing is what turns a tender sheet cake dense and tough.

Bake and Glaze

7. Pour the batter into the prepared baking pan and spread evenly. Bake for 25-30 minutes, or until a wooden skewer inserted into the center comes out clean.
8. Let the cake cool in the pan on a wire rack for about 15 minutes before inverting it onto the rack to cool completely.
9. While the cake cools, prepare the glaze by whisking together the powdered sugar and lemon juice in a small bowl until smooth.
10. Once the cake is completely cool, drizzle the lemon glaze over the top.

Pro Tip: Wait until the cake is fully cool before glazing, or the glaze will melt straight into the crumb instead of setting on top.

Expert Tips for Perfect Lemon Blueberry Sheet Cake

Pro Tips for Success

The key to a tender crumb is creaming the butter and sugar long enough that the mixture turns pale and fluffy before the eggs go in. For best results, bring your eggs and milk to room temperature first, since cold ingredients can make the batter look curdled and uneven.

The most common mistake is dumping frozen blueberries in wet — instead, keep them frozen and add them straight from the freezer so they don’t streak blue through the batter. Lemon blueberry sheet cake works best when the lemon zest goes in right before baking, since that’s when the oils are most fragrant.

For best results, check the cake at the 25 minute mark with a wooden skewer rather than waiting the full 30, since ovens vary and a dry cake is hard to fix once it’s out. I learned the hard way that pulling it one minute late can be the difference between moist and crumbly.

Delicious Variations

Gluten-Free Version: Swap the all-purpose flour for a 1:1 gluten-free baking blend and keep every other measurement the same. The texture stays close to the original since the blend mimics flour’s structure.

Alternative Ingredients: Try raspberries or blackberries in place of blueberries for a similar burst of tartness. The batter and glaze stay exactly the same, just the fruit changes.

Quick Version: Skip the glaze entirely and dust the cooled cake with powdered sugar instead. It saves a step and still looks finished for a casual weeknight dessert.

Troubleshooting Common Problems

Problem: The blueberries sank to the bottom of the cake.

Solution: This usually happens when berries are added too early or the batter is too thin. Fold them in gently at the very end, right before pouring into the pan.

Problem: The cake came out dense instead of fluffy.

Solution: This is almost always overmixing once the flour is added. Mix only until the streaks of flour disappear, then stop immediately.

How to Store and Reheat Lemon Blueberry Sheet Cake

Storage Method	Duration	Best Practice
Room Temperature	2 days	Cover tightly to keep glaze from drying out
Refrigerator	5 days	Store in an airtight container
Freezer	3 months	Wrap unglazed slices individually before freezing

This cake doesn’t need reheating, but a few seconds in the microwave brings back a fresh-baked softness if it’s been refrigerated. From frozen, thaw at room temperature for about an hour before glazing and serving.

Leftover slices crumble nicely over yogurt or vanilla ice cream for a fast dessert upgrade. A stale corner of cake also works well toasted lightly and topped with extra lemon glaze.

FAQs About Lemon Blueberry Sheet Cake

Why is my lemon glaze too thin or too thick?

The glaze thickness depends on how much lemon juice you whisk in, so start with 2 tablespoons and add more only if needed. If it turns out too thin, whisk in a little extra powdered sugar until it reaches a drizzle consistency.

Make this lemon blueberry sheet cake this weekend, seriously. It’s the kind of dessert that disappears fast and gets requested again before you’ve even washed the pan. Save this recipe to Pinterest, and if you try it, leave a comment letting me know how it turned out.

If you’re craving more fruity desserts, try this strawberry shortcake sheet cake, this blueberry oatmeal breakfast cake, or these baked lemon blueberry donuts for another citrus fix.

Lemon Blueberry Sheet Cake: a buttery, tender crumb loaded with juicy blueberries and finished with a tangy lemon glaze. The easy lemon blueberry dessert your next gathering needs. Save this recipe!