Ingredients:

  • 1 ½ cups (150g) graham cracker crumbs
  • ⅓ cup (75g) granulated sugar
  • 6 tbsp (85g) unsalted butter, melted
  • 1 can (14 oz / 397g) sweetened condensed milk
  • 3 large (150g) eggs
  • ⅓ cup (80ml) fresh lemon juice
  • ⅓ cup (80ml) fresh lime juice
  • 1 tbsp (6g) lemon zest
  • 1 tbsp (6g) lime zest
  • ¼ tsp (1.5g) salt
  • ½ cup (60g) confectioners' sugar, sifted

Instructions:

  1. Preheat your oven to 350°F (175°C). Line your baking pan with parchment paper, leaving an overhang on two sides for easy removal.
  2. Combine graham cracker crumbs, sugar, and melted butter in a bowl until the mixture resembles wet sand.
  3. Press the mixture firmly into the bottom of the pan using the back of a spoon.
  4. Bake for 8–10 minutes until the edges are lightly browned and it smells nutty. Remove from the oven and let it cool slightly.
  5. In a large bowl, whisk the sweetened condensed milk and eggs together until smooth.
  6. Stir in the fresh lemon juice, lime juice, lemon zest, lime zest, and salt.
  7. Whisk gently until combined; avoid over-beating to prevent incorporating too many air bubbles.
  8. Pour the filling evenly over the warm crust, smoothing the top with an offset spatula.
  9. Bake for 18–22 minutes until the edges are set, but the center still has a slight, jelly-like jiggle.
  10. Remove from the oven and cool completely on a wire rack.
  11. Transfer the pan to the refrigerator for at least 4 hours (or overnight) to ensure the bars are fully set.
  12. Lift the bars out using the parchment handles and dust generously with sifted confectioners' sugar.