I live for a beautifully stacked, frosted, three-layer cake masterpiece. Truly. There’s something so elegant about a perfectly curated round cake. It’s giving hostess vibes, celebration energy, and Pinterest perfection. But in my house of seven (yes, seven), that dainty little cake doesn’t last long or go very far (though you’ll still see one from time to time around here, I love a Pinterest moment). By the time everyone’s had a slice, it’s practically vanished, and someone’s already asking what’s for dessert tomorrow.
That’s where this Lemon Blueberry Sheet Cake comes in. Bright, lemony, bursting with blueberry goodness, and just the right size to actually feed a family. It’s a one-pan wonder that skips the layers but absolutely does not skip the flavor. If a lemon brownie and a vanilla cake had a baby and smothered it in blueberry frosting, this would be it.
The cake itself is loaded with fresh lemon zest and juice, which gives it that sunny citrus flavor without being overpowering. The texture is somewhere between a brownie and a traditional cake. Moist, chewy, and just dense enough to be satisfying without feeling heavy. And that frosting? It’s a whole moment. I blend in real blueberries to give it a gorgeous purple hue and a fresh berry punch, then top it with more fresh berries for that “please eat me now” look.
Tips & Tricks for Sheet Cake Success
This recipe is super forgiving, but here are a few ways to make it your own (or troubleshoot if needed):
- Don’t skimp on the zest. Fresh lemon zest gives the cake its vibrant flavor, so zest those lemons like you mean it.
- Room temperature ingredients are your friend. Let your eggs and butter sit out for a bit before baking. This helps everything mix together smoothly.
- Swap out the blueberries if they’re not your thing! You can easily use strawberry or raspberry preserves in the frosting instead. Cherry would be delicious, too. The base is neutral enough to work with just about any berry you love.
- Want to make it ahead? Bake the cake a day in advance, cover tightly, and frost just before serving.
Still craving citrus?
If you’re here for lemon everything (you are my people), then you’re going to love my Lemon Rice Krispie Treats. They’re bright, gooey, and unexpectedly addicting. Or if you’re in the mood for something a little more old-school and comforting, my Old Fashioned Banana Pudding is a must-try. It’s the kind of dessert that makes you want to grab a spoon and a cozy blanket.
Whether you’re baking this for a potluck, a picnic, or just a Tuesday night “we need dessert” moment, this Lemon Blueberry Sheet Cake brings all the summer vibes with very little fuss. It’s easy, it’s pretty, and it disappears fast. Which, honestly, is the sign of a great cake.
Save a slice for yourself before the kids find it. Trust me.
Lemon Blueberry Sheet Cake
Ingredients
Cake
- 2 3/4 cups flour
- 2 tsp baking powder
- 1/4 tsp baking soda
- 1/2 tsp salt
- 2 cups sugar
- 2 tbsp lemon zest grated
- 1/3 cup fresh lemon juice (from 2-3 lemons)
- 3 eggs room temperature
- 1 cup oil
- 2 tsp vanilla extract
- 1/2 tsp lemon extract
- 3/4 cup buttermilk room temperature
Frosting
- 2 sticks butter softened
- 1/3 cup blueberry preserves room temperature
- 1 tbsp fresh lemon juice
- 4 cups powdered sugar
- 1 container blueberries
Instructions
Cake
- Preheat oven to 350℉. Spray a 13×18 inch baking sheet with cooking spray and set aside.
- In a large bowl, whisk together flour, baking powder, baking soda, and salt. Set aside.
- In another large bowl, add sugar and lemon zest. Work the lemon zest into the sugar using your hands to infuse the lemon flavor.
- Add the eggs to the sugar mixture and whisk together until frothy and light in color (about two minutes). Whisk in oil, vanilla extract, lemon extract, and lemon juice.
- Gradually stir in flour mixture and buttermilk, alternating between the two, mixing well between each addiiton.
- Transfer batter to prepared baking sheet. Bake for 16-18 minutes or until a toothpick inserted into the center comes out clean.
- Allow cake to cool completely for one to two hours before frosting.
Frosting
- Beat butter using a mixer on medium speed until smooth. Add preserves and lemon juice on low speed until just combined and then increase the speed to medium until butter and preserves are completely combined.
- Gradually add in powdered sugar on low speed until combined. Scrape down the sides of the bowl and continue to mix on medium speed until all ingredients are well combined, smooth, and fluffy.
- Spread the frosting evenly over the cake. Top with fresh blueberries.
