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Lemon Berry Crumble Squares

A single serving of berry crumble Dessert Squares showing a thick layer of dark purple berries and a crumbly topping.
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Make these simple, bright lemon and berry squares with a buttery crumble base and topping. They slice cleanly and are perfect for sharing.

Ingredients

Scale
  • 1 1/2 cups all-purpose flour
  • 1/2 cup granulated sugar
  • 1/2 teaspoon baking powder
  • 1/4 teaspoon salt
  • 1/2 cup cold unsalted butter, cubed
  • 1 large egg
  • 1 teaspoon vanilla extract
  • 1 cup fresh or frozen mixed berries
  • 1/2 cup granulated sugar
  • 2 tablespoons cornstarch
  • 1/4 cup fresh lemon juice
  • 1 tablespoon lemon zest
  • 1/4 cup all-purpose flour (for topping)
  • 1/4 cup packed brown sugar (for topping)
  • 1/4 cup cold unsalted butter, cubed (for topping)

Instructions

  1. Preheat your oven to 350°F (175°C). Line an 8×8 inch baking pan with parchment paper, leaving an overhang on two sides for easy removal.
  2. In a medium bowl, combine 1 1/2 cups flour, 1/2 cup sugar, baking powder, and salt for the base. Cut in the 1/2 cup cold butter until the mixture resembles coarse crumbs.
  3. Whisk the egg and vanilla extract together. Add this to the flour mixture and mix until a soft dough forms. Press this dough evenly into the bottom of the prepared pan.
  4. Bake the crust for 15 minutes until lightly set.
  5. While the crust bakes, prepare the filling. In a small saucepan, combine berries, 1/2 cup sugar, cornstarch, lemon juice, and lemon zest. Cook over medium heat, stirring constantly, until the mixture thickens, about 5 to 7 minutes. Remove from heat.
  6. For the crumble topping, mix the remaining 1/4 cup flour and brown sugar in a small bowl. Cut in the remaining 1/4 cup cold butter until crumbly.
  7. Pour the berry filling evenly over the partially baked crust. Sprinkle the crumble topping over the berry layer.
  8. Return the pan to the oven and bake for an additional 25 to 30 minutes, or until the topping is golden brown and the filling is bubbly.
  9. Let the squares cool completely in the pan on a wire rack before lifting out using the parchment paper overhang and cutting into 16 squares.

Notes

  • For the cleanest cuts, chill the cooled squares in the refrigerator for at least one hour before slicing.
  • Use frozen berries if fresh are unavailable; do not thaw them before cooking the filling.
  • If you prefer a stronger lemon flavor, increase the zest to 2 teaspoons.

Nutrition

Find it online: https://flavorvista.com/lemon-berry-crumble-dessert-squares/