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Lemon Brownies

Lemon Brownies are dessert bars that are dense and moist with a lemony flavor and topped with a sweet glaze.

Course Dessert
Cuisine American
Keyword Lemon Brownies
Prep Time 20 minutes
Cook Time 50 minutes
Total Time 1 hour 10 minutes
Servings 12
Calories 391 kcal
Author Amanda Rettke--iambaker.net


  • 1 cup (2 sticks or 226g) unsalted butter, melted
  • cups (350g) light brown sugar, packed
  • 3 large eggs, room temperature
  • 2 tablespoons lemon juice
  • 1 teaspoon lemon zest
  • cups (285g) all-purpose flour
  • 2 teaspoons cornstarch
  • 1 teaspoon baking powder
  • ½ teaspoon kosher salt

Glaze (Optional)

  • 1 cup confectioners' sugar
  • 2 tablespoons water, or lemon juice (if want more lemon flavor)


  1. Preheat oven to 350°F and prepare a 9x9-inch pan by lining it with parchment paper (or lightly grease and flour). (You could use a 9x13-inch pan for more servings, but the bars will be thinner.)

  2. In a large bowl, combine the melted butter and brown sugar. Stir well.

  3. Add the eggs and the egg yolk, one at a time, stirring well after each addition.
  4. Stir in the lemon juice and lemon zest.
  5. In a separate, medium-sized bowl, whisk together the flour, cornstarch, baking powder, and salt.
  6. Gradually stir the flour mixture into the butter and egg mixture until completely combined.
  7. Spread the batter evenly into the prepared pan. Bake 35-45 minutes, or until the edges are turning golden brown. (If you are using a 9x13-inch pan, bake for 25-30 minutes.)

  8. Allow brownies to cool before glazing.


  1. In a medium bowl, combine the confectioners' sugar and water and whisk until smooth.

  2. Pour the glaze over the cooled brownies and serve.