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Grapefruit Lemon Bars

Grapefruit Lemon Bars

  • Author: Molly
  • Total Time: 55 minutes
  • Yield: 8 servings 1x


These Grapefruit Lemon Bars are a citrus lover’s dream! Tart and tangy, sweet and buttery – they are the best of all worlds and a delightful twist on the classic lemon bar.



For the Crust:

  • 1 stick of butter, melted
  • ¼ cup sugar
  • 1 cup all-purpose flour
  • ½ teaspoon fine salt

For the Filling:

  • Zest of 2 lemons (zest before juicing!)
  • Zest of 1 grapefruit (zest before juicing!)
  • ½ cup freshly squeezed grapefruit juice (this was 1 grapefruit for me)
  • ½ cup freshly squeezed lemon juice (this was 2 lemons for me)
  • 3 large eggs, at room temperature
  • 3 tablespoons all-purpose flour
  • 1 cup sugar

Powdered sugar, for dusting


For the Crust:

  1. Preheat the oven to 350°F and butter an 8 x 8-in baking dish. Line the baking dish with parchment paper so that it overhangs the sides (this makes it easier to remove the bars from the pan later).
  2. Mix together the melted butter, sugar, flour, and salt until a dough forms. It will be thick.
  3. Press the dough into the prepared pan and up the sides a little bit. Bake for 15-20 minutes or until set in the center and the edges are lightly golden brown. Remove from oven and allow to cool slightly.

For the Filling:

  1. While the crust is baking, make the filling by whisking together the citrus zests, juices, eggs, flour, and sugar. Whisk until completely smooth.
    Pour the filling over the slightly cooled crust, smoothing out the top as needed.
  2. Transfer to the oven and bake for 20-25 minutes or until the edges are set and the middle is only slightly jiggly when you gently shake the pan.
  3. Remove from the oven and cool to room temperature. Transfer to the fridge to chill for at least 2 hours before cutting into bars.
  4. Dust with powdered sugar and serve.


Store the bars in the fridge in an airtight container for up to a week. These are best served chilled.

  • Prep Time: 10 minutes
  • Cook Time: 45 minutes (plus chilling time)
  • Category: dessert

Keywords: grapefruit lemon bars, grapefruit bars, lemon bars, grapefruit desserts, citrus desserts