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A close-up of lemon blueberry sheet cake showing blueberries inside and glaze dripping on top

Lemon Blueberry Sheet Cake

Emily Wilson
A soft, citrusy lemon cake studded with fresh blueberries and finished with a simple lemon glaze. Perfect for summer gatherings, picnics, or a quick weeknight dessert.
Prep Time 20 minutes
Cook Time 45 minutes
Total Time 1 hour 5 minutes
Course Dessert
Cuisine American
Servings 16 pieces
Calories 310 kcal

Equipment

  • Hand Mixer
  • Mixing bowls
  • 9x13 baking dish
  • Spatula
  • Parchment paper

Ingredients
  

Cake Ingredients

  • 3 cups all-purpose flour
  • 2 teaspoons baking powder
  • 0.5 teaspoon baking soda
  • 1.25 teaspoons salt
  • 1 cup butter softened
  • 1.5 cups granulated sugar
  • 0.25 cup lemon juice plus zest of 2 lemons
  • 4 large eggs
  • 1 cup buttermilk
  • 2 teaspoons vanilla extract
  • 1.5 cups fresh blueberries tossed with 1 tablespoon flour

Lemon Glaze

  • 2.5 cups powdered sugar
  • 0.33 cup lemon juice

Instructions
 

  • Preheat the oven to 350°F. Grease a 9×13 inch baking dish and line with parchment paper, leaving some overhang on the sides.
  • In a medium bowl, whisk together flour, baking powder, baking soda, and salt. Set aside.
  • In a large bowl, cream together softened butter and sugar until light and fluffy. Add eggs one at a time, then mix in vanilla and buttermilk.
  • Stir in lemon zest and juice. Add the dry ingredients and mix until just combined.
  • Gently fold in the floured blueberries. Pour the batter into the prepared pan and spread evenly.
  • Bake for 40 to 45 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs. Let the cake cool completely.
  • In a small bowl, mix powdered sugar and lemon juice until smooth. Drizzle over the cooled cake and allow the glaze to set before serving.

Notes

Nutrition Information (Per Serving)
  • Calories: 310 kcal
  • Carbohydrates: 45 g
  • Protein: 4 g
  • Fat: 14 g
  • Saturated Fat: 8 g
  • Cholesterol: 65 mg
  • Sodium: 210 mg
  • Potassium: 75 mg
  • Fiber: 1 g
  • Sugar: 30 g
  • Vitamin A: 400 IU
  • Vitamin C: 3 mg
  • Calcium: 60 mg
  • Iron: 1.5 mg
Notes:
  • The sugar content is primarily from the cake batter and the lemon glaze. To reduce sugar, consider halving the glaze or skipping it altogether.
  • Butter and eggs contribute most of the saturated fat and cholesterol. A plant-based butter and egg substitute could reduce these numbers.
  • The cake contains a small amount of fiber from the blueberries and flour, but overall it's a treat, not a fiber-rich snack.
  • For those tracking calcium or iron, there are modest amounts, but it should not be relied on as a significant source of either.
  • Calories may increase slightly if additional glaze, toppings, or whipped cream are added before serving.