Grapefruit Bars
Ingredients
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- 2 cups all-purpose flour
- 1/2 cup granulated sugar
- 1/2 tsp fine sea salt
- 1 cup unsalted butter – cold, cut into small cubes
- 6 large eggs
- 2 cups granulated sugar
- 1/2 cup all-purpose flour
- 1/4 tsp fine sea salt
- 1 tbsp grapefruit zest
- 1 cup grapefruit juice – freshly squeezed, strained
- 2 tbsp lemon juice – freshly squeezed
- powdered sugar – sifted over top (for serving)
Instructions
1. Preheat the oven to 350°F (175°C). Line a 9×13-inch metal baking pan with parchment, leaving a 2-inch overhang on the long sides for lifting.
2. Make the crust: In a large bowl, combine 2 cups all-purpose flour, 0.5 cup granulated sugar, and 0.5 tsp fine sea salt.
3. Add 1 cup cold, cubed unsalted butter and cut it into the dry ingredients with a pastry blender or fingertips until the mixture resembles coarse crumbs and holds together when pressed.
4. Press the mixture evenly and firmly into the prepared pan. Bake until the edges are lightly golden and the surface looks dry, 15–18 minutes.
5. While the crust bakes, make the filling: In a medium bowl, whisk 6 large eggs just until blended. Whisk in 2 cups granulated sugar until smooth.
6. Whisk in 0.5 cup all-purpose flour and 0.25 tsp fine sea salt until no dry spots remain. Stir in 1 tbsp grapefruit zest, then whisk in 1 cup freshly squeezed, strained grapefruit juice and 2 tbsp freshly squeezed lemon juice.
7. Reduce the oven temperature to 325°F (165°C). Immediately pour the filling over the hot crust (for an extra-smooth top, pour the filling through a fine-mesh sieve into the pan).
8. Bake until the center is just set with a slight jiggle and the surface no longer looks wet, 22–28 minutes. Do not brown.
9. Cool the pan on a rack for 1 hour, then refrigerate until fully cold and firm, at least 1 hour more.
10. Use the parchment to lift the slab out. Dust generously with powdered sugar, trim edges if desired, and cut into 24 bars. Serve chilled or at cool room temperature.
Grapefruit bars are a bright, citrusy take on the beloved lemon bar, pairing a buttery shortbread crust with a silky grapefruit curd-like topping. The flavor leans fragrant and floral with a gentle bitterness unique to grapefruit, rounded by sweetness and a clean, tart finish. Their texture contrasts a crisp-tender base with a softly set, custardy layer that slices neatly when chilled. A snowfall of powdered sugar highlights the rosy hue and adds a delicate sweetness.
A descendant of American lemon bars popularized in mid-20th-century home baking, grapefruit bars gained a following in citrus-growing regions like Florida and Texas. The advent of sweeter pink and ruby red varieties made grapefruit a natural candidate for bar desserts, encouraging bakers to adapt the classic formula. Over time, the dessert spread through community cookbooks and magazines, becoming a seasonal favorite when grapefruit is at its peak in winter. Today, they sit comfortably in the American bar-cookie canon as a refreshing alternative to lemon.