Ingredients:

  • 1/2 cup (115g) unsalted butter, melted
  • 1/4 cup (30g) all-purpose flour
  • 1/4 cup (30g) powdered sugar
  • 1/4 tsp (1.5g) salt
  • 2 cups (200g) powdered sugar
  • 2 tbsp (16g) all-purpose flour
  • 4 large eggs
  • 1/2 cup (120ml) fresh lemon juice
  • 1 tbsp (6g) lemon zest

Instructions:

  1. Preheat your oven to 350°F (175°C) and line a 9x9 inch square baking pan with parchment paper, leaving an overhang on the sides.
  2. Stir together melted butter, 30g flour, 30g powdered sugar, and salt until a soft dough forms.
  3. Press the dough firmly and evenly into the bottom of the pan.
  4. Bake for 20 minutes or until the edges are just beginning to turn a pale mahogany-gold.
  5. While the crust is baking, whisk the 200g powdered sugar and 16g flour together to remove lumps.
  6. Add eggs one at a time, beating until smooth.
  7. Stir in the fresh lemon juice and zest until the mixture is a uniform, bright yellow.
  8. Pour the filling over the hot crust immediately after removing it from the oven.
  9. Bake for an additional 20 minutes; the center should have a slight wobble but the edges should be set.
  10. Remove from the oven and allow to cool to room temperature on a wire rack.
  11. Transfer to the fridge for at least 2 hours to set.
  12. Lift the bars out using the parchment handles, dust generously with powdered sugar, and slice into 16 equal squares using a hot, dry knife.