Zesty Lime Citrus Bars (Printable)

Bright lime filling over buttery shortbread crust. Sweet-tart balance perfect for citrus enthusiasts.

# What You’ll Need:

→ Shortbread Crust

01 - 1 cup all-purpose flour
02 - 1/4 cup powdered sugar
03 - 1/2 cup unsalted butter, cold and diced
04 - 1/4 teaspoon salt

→ Lime Citrus Filling

05 - 1 cup granulated sugar
06 - 2 tablespoons all-purpose flour
07 - 1/4 teaspoon baking powder
08 - 3 large eggs
09 - 1/2 cup freshly squeezed lime juice
10 - 1 tablespoon finely grated lime zest
11 - 1/4 cup freshly squeezed lemon juice

→ Topping

12 - Powdered sugar for dusting

# How To Make It:

01 - Preheat oven to 350°F. Line an 8x8 inch baking pan with parchment paper, leaving an overhang for easy removal.
02 - Combine flour, powdered sugar, and salt in a bowl. Cut in diced butter until mixture resembles coarse crumbs. Press evenly into the bottom of the prepared pan.
03 - Bake crust for 15-18 minutes until just golden at the edges. Let cool slightly.
04 - Whisk together granulated sugar, flour, and baking powder. Add eggs, lime juice, lemon juice, and lime zest. Whisk until smooth.
05 - Pour filling over the baked crust. Bake for 18-20 minutes until set and slightly golden at the edges; the center should not jiggle.
06 - Cool completely in the pan, then refrigerate for at least 1 hour before slicing.
07 - Dust with powdered sugar before serving. Cut into bars.

# Expert Tips:

01 -
  • The lime filling is impossibly smooth, almost like eating sunshine on a fork
  • That buttery shortbread crust creates the perfect contrast to the tangy topping
  • They actually get better after a day in the fridge, making them perfect for prep-ahead desserts
02 -
  • I once tried cutting these before they were completely chilled and ended up with a gorgeous but messy puddle of lime filling, so patience is genuinely a ingredient here
  • The parchment paper overhang is not optional unless you enjoy the challenge of trying to unstick shortbread from a pan
  • Fresh citrus juice makes such a difference that bottled juice will give you a completely different, flatter tasting dessert
03 -
  • Room temperature ingredients for the filling prevent the butter in your hot crust from solidifying and creating weird layers
  • Grating the limes before juicing them is so much easier than trying to zest a squishy squeezed lime