° 4 Tbsp unsalted butter, melted and cooled, plus pan
° 2/3 cup ground almond or walnut flour (whichever you prefer)
° 1 cup (4 oz) graham cracker crumbs
° 1/4 cup sugar
° 1 Tbsp grated lime zest
+For filling
° 2 large egg yolks
° 1 can (14 oz) sweetened condensed milk
° 1/2 cup fresh lime juice (about 5 medium limes)
° 2 tablespoons fresh lemon juice (about 1 medium lemon)
*INSTRUCTIONS
Preheat oven to 350 degrees. Brushing an 8-inch square baking dish with butter. (This step is important as it will be easy for you to remove the parchment paper later.) Line the bottom with parchment paper, leaving a 2-inch overhang on both sides.
To make the crust:
Whisk together almond flour and ground walnuts with graham cracker crumbs, sugar and zest.
Stir in butter. Press mixture into bottom and 1 inch on sides of prepared pan. Bake until lightly browned, 8 to 12 minutes. Cool the crust, 30 minutes.
To do the filling:
In a large bowl, whisk together the egg yolks and condensed milk. Add lime juice and lemon juice; whisk until smooth. Pour filling into cooled crust; gently spread on edges.
Bake for about 15 minutes. Cool on a wire rack, then refrigerate for at least 1 hour before serving.
Using a parchment paper overhang, lift the pan and transfer to a cutting board. Using a serrated knife, cut into 16 squares, wipe the knife with a damp kitchen cloth between each cut.