Lemon Blueberry Sheet Cake

Imagine cutting into a golden-brown cake studded with vibrant blueberries, the scent of fresh lemons wafting through your kitchen. This Lemon Blueberry Sheet Cake is a delightful dessert that takes just about an hour from start to finish. With its moist texture and zesty flavor, it’s sure to be a crowd-pleaser at any gathering.

This recipe is perfect for everyone—families, friends, or anyone looking to brighten their day with a slice of cake. It’s ideal for summer picnics, birthday celebrations, or a casual afternoon treat. If you’re looking to make it ahead, the cake stores beautifully and can be kept for up to three days.

Why You’ll Love This Recipe

• The cake is incredibly moist and fluffy, thanks to the buttermilk and fresh blueberries.
• It features a light and tangy glaze that perfectly complements the sweetness of the cake.
• This recipe is easy to follow, making it great for bakers of all skill levels.
• It has a wonderful balance of flavors, with the bright lemon zest lifting the entire dessert.

What You’ll Need

Here’s everything you need to make this delicious 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, softened (2 sticks)
• 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

Use unsalted butter for better control of saltiness.

Substitutions & Swaps

• Substitute buttermilk with regular milk plus vinegar.
• Use frozen blueberries if fresh ones aren’t available.
• Lemon juice can be replaced with lime juice for a twist.
• Swap granulated sugar with coconut sugar for a healthier option.

How to Make It

Let’s dive into the baking process for this delightful sheet cake.

Preheat the oven

Preheat the oven to 350 degrees F. Grease a 9×13 baking dish and line it with parchment paper, leaving an overhang on the long sides for easy cake removal.

Mix dry ingredients

In a medium mixing bowl, whisk together the dry ingredients: flour, baking powder, baking soda, and salt. Set this mixture aside.

Cream butter and sugar

In a stand mixer fitted with the paddle attachment (or a hand mixer), cream together the butter and granulated sugar until the mixture is light and fluffy.

Add wet ingredients

Add the eggs, vanilla extract, and buttermilk to the creamed mixture, mixing on low until fully incorporated.

Combine and stir

Gradually add in the dry ingredients, mixing until there are no streaks of flour. Then, fold in the lemon juice, zest, and gently stir in the blueberries with a spatula.

Bake the cake

Pour the batter into the prepared 9×13 baking dish and bake for about 40-45 minutes, or until a toothpick comes out with moist crumbs. Allow the cake to cool completely before proceeding.

Prepare the glaze

For the glaze, whisk together the powdered sugar and lemon juice until smooth. Once the cake has cooled, pour the glaze over the top, allowing it to harden. Garnish with fresh fruit if desired.

How to Store It

Fridge: Store cake in an airtight container for up to 3 days.
Freezer: Yes, for up to 3 months.
Reheat: Microwave individual pieces for 15-20 seconds.

Tips for Best Results

• Ensure your butter is at room temperature for easier creaming.
• Tossing blueberries in flour prevents them from sinking during baking.
• Don’t overmix the batter to keep the cake tender.
• Allow the cake to cool completely before glazing for better adhesion.

Serving Suggestions

• Serve with whipped cream and extra blueberries on top for a treat.
• Pair with a cup of tea or coffee for afternoon gatherings.
• Perfect for summer potlucks or birthday parties.