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Lemon Blueberry Sheet Cake

Lemon Blueberry Sheet Cake

This Lemon Blueberry Sheet Cake is the ultimate easy dessert for warm days. Light, fluffy lemon cake is packed with juicy blueberries and finished with a bright citrus glaze that adds the perfect tangy-sweet touch. It’s simple to make, uses everyday ingredients, and bakes beautifully in one pan—no complicated steps required. Whether you’re hosting a gathering, planning a brunch, or just craving something fresh and fruity, this cake delivers every time. Each bite is soft, moist, and bursting with flavor, making it a go-to recipe for spring and summer baking. Honestly, it disappears faster than you expect.
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Prep Time 20 minutes
Cook Time 45 minutes
Course: Breakfast, Dessert, Mother's Day Brunch, Snack
Cuisine: American
Ingredients Method Notes

Ingredients
  

  • Ingredients
  • For the Cake:
  • 3 cups all-purpose flour
  • 2 tsp baking powder
  • ½ tsp baking soda
  • 1 ¼ tsp salt
  • 1 cup unsalted butter softened
  • 1 ½ cups granulated sugar
  • Zest and juice of 2 lemons ≈ ¼ cup juice
  • 4 large eggs
  • 1 cup buttermilk
  • 2 tsp vanilla extract
  • 1 ½ cups fresh blueberries lightly coated with 1 tbsp flour
  • For the Lemon Glaze:
  • 2 ½ cups powdered sugar
  • ⅓ cup fresh lemon juice

Method
 

Step 1: Prep Your Pan & Oven

Set your oven to 350°F (175°C). Lightly grease a 9×13-inch pan, then line it with parchment paper, leaving extra hanging over the sides for easy lifting later.

    Step 2: Mix Dry Ingredients

    In a medium bowl, whisk together flour, baking powder, baking soda, and salt. Keep this mixture aside.

      Step 3: Cream Butter & Sugar

      Using a stand mixer (or hand mixer), beat the butter and sugar until pale and fluffy. This step builds the cake’s soft texture—don’t rush it!

        Step 4: Add Wet Ingredients

        Mix in the eggs one at a time. Then add vanilla extract and buttermilk. Blend on low speed until smooth and combined.

          Step 5: Combine Batter

          Gradually add the dry mixture into the wet ingredients. Mix just until no dry spots remain. Stir in lemon zest and juice.

            Step 6: Fold in Blueberries

            Gently fold the floured blueberries into the batter using a spatula. This keeps them from sinking.

              Step 7: Bake

              Spread the batter evenly in your prepared pan. Bake for 40–45 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs.

                Step 8: Cool Completely

                Let the cake cool fully in the pan before removing or glazing.

                  Notes

                  🍯 Make the Lemon Glaze

                  Whisk powdered sugar with fresh lemon juice until smooth and pourable. Drizzle evenly over the cooled cake. Let it set before slicing.

                  🍓 Topping & Serving Ideas

                  • Add fresh blueberries and lemon slices on top for a fresh look
                  • Serve with whipped cream or vanilla ice cream
                  • Sprinkle extra lemon zest for a stronger citrus aroma
                  • Dust lightly with powdered sugar for a bakery-style finish

                  💡 Expert Tips (Don’t Skip!)

                  • Toss blueberries in flour to prevent sinking
                  • Use room temperature ingredients for smoother batter
                  • Avoid overmixing—this keeps the cake soft, not dense
                  • Fresh lemon juice > bottled for the best flavor
                  • Let the glaze set fully before cutting for clean slices

                  ❓ FAQs

                  Can I use frozen blueberries?
                   Yes! Just don’t thaw them first—add straight to the batter to avoid excess moisture.
                  What can I use instead of buttermilk?
                   Mix 1 cup milk with 1 tbsp lemon juice or vinegar. Let sit 5 minutes.
                  How do I store this cake?
                   Keep it in an airtight container at room temp for up to 2 days, or refrigerate for up to 5 days.
                  Can I make this ahead?
                   Absolutely. Bake the cake a day ahead, then glaze before serving.

                  🧡 Final Thoughts

                  This lemon blueberry sheet cake hits that perfect balance—fresh, sweet, slightly tangy, and incredibly easy to make. It’s the kind of dessert that feels effortless but tastes like you planned it all along. Whether you’re baking for a casual afternoon or sharing with a crowd, this one never disappoints. And fair warning… slices tend to disappear fast. 😄
                  Lemon Blueberry Sheet Cake - 3 Thumbnail