Zesty Grapefruit Bars (Printable)

Buttery shortbread crust topped with bright grapefruit custard, perfectly balanced between sweet and tart flavors.

# What You Need:

→ Shortbread Crust

01 - 1 cup unsalted butter, softened
02 - ½ cup granulated sugar
03 - 2 cups all-purpose flour
04 - ¼ teaspoon salt

→ Grapefruit Filling

05 - 1 ¼ cups granulated sugar
06 - ¼ cup all-purpose flour
07 - 4 large eggs
08 - ¾ cup freshly squeezed grapefruit juice
09 - 1 tablespoon grapefruit zest
10 - 2 tablespoons freshly squeezed lemon juice

→ Finishing

11 - Powdered sugar for dusting

# Steps:

01 - Preheat oven to 350°F. Line a 9x9-inch baking pan with parchment paper, allowing edges to overhang for easy removal later.
02 - In a large bowl, cream together softened butter and granulated sugar until light and fluffy. Mix in flour and salt until just combined.
03 - Press dough evenly into pan bottom. Bake for 18-20 minutes until edges are lightly golden.
04 - While crust bakes, whisk sugar and flour in a separate bowl. Add eggs, grapefruit juice, zest, and lemon juice, whisking until smooth.
05 - Pour filling mixture over the hot crust immediately after removing from oven.
06 - Return pan to oven and bake for 18-22 minutes until center is just set and no longer jiggles excessively.
07 - Let cool completely in pan. Lift out using parchment edges and cut into bars.
08 - Dust with powdered sugar just before serving.

# Expert Advice:

01 -
  • The balance between tart grapefruit and sweet buttery crust is absolutely perfect
  • They look stunning with that pale yellow custard and snowy powdered sugar topping
  • They travel well and actually taste better after chilling overnight
02 -
  • Pouring the filling onto the hot crust is crucial because it helps seal the bottom and prevents a soggy layer
  • The center should still have a slight wobble when you remove it from the oven because it continues cooking as it cools
03 -
  • Use room temperature eggs to prevent them from curdling when you mix them into the juice
  • A fine mesh sieve makes the cleanest powdered sugar dusting without clumps