COCONUT-KEY LIME SQUARES

Steps:

• Crust: Preheat oven to 400 degrees. Lightly butter an 8-inch square baking pan. Line bottom and 2 sides of pan with parchment, leaving a 1-inch overhang; lightly butter the parchment.
• Combine flour, brown sugar, and salt in a food processor, and pulse a few times to combine. Add butter, and pulse until largest pieces are the size of peas. Add coconut and white chocolate, and pulse a few more times, just until mixture holds together. Transfer mixture to pan, and pack down firmly with the bottom of a measuring cup. Bake until crust is deep golden brown, 18 to 20 minutes. Remove from oven, and reduce heat to 300 degrees.
• Filling: Whisk together eggs and granulated sugar in a bowl, then whisk in flour. Gently stir in lime juice (do not whisk or stir vigorously or batter will become foamy).
• Pour filling over hot crust, and bake until filling is set, about 15 minutes. Let cool completely on a wire rack.
• Run the tip of a knife along the 2 sides of the pan not lined with parchment, then remove from pan by lifting with parchment overhang. Transfer to a cutting board, dust with confectioners' sugar, and cut into 1-inch squares.