I made these very yummy Key Lime Bars the other day, as a switch from chocolate overload. Sort of the last of the summer hurrah, as lime anything is more a warm weather thing.
Key Lime Bars
If you can’t find fresh Key limes, use regular limes, but don’t use bottled lime juice (you need the lime zest anyway). Grate the zest from the limes before juicing them, avoiding the bitter white pith that lies just beneath the outermost skin. The optional coconut garnish adds textural interest and tames the lime flavor for those who find it too intense.
The recipe can be doubled and baked in a 13- by 9-inch baking pan; you will need a double layer of extra-wide foil for the pan (each sheet about 20 inches in length) and should increase the baking times by a few minutes
Ingredients for the Crust
5 Graham crackers (or about 7 oz Graham Cracker crumbs)
3 tablespoons brown sugar (light or dark)
Pinch table salt
4 tablespoons unsalted butter , melted and cooled slightly
Ingredients for the Filling
2 ounces cream cheese, room temperature
1 tablespoon grated lime zest , minced
Pinch table salt
1 (14-ounce) can sweetened condensed milk
1 egg yolk
1/2 cup fresh lime juice, either Key lime or regular
3/4 cup sweetened shredded coconut, toasted until golden and crisp
1. Adjust oven rack to middle position and heat oven to 325 degrees. Cut about 12-inch length extra-wide heavy-duty foil; fold cut edges back to form 7 1/2-inch width. With folded sides facing down, fit foil securely into bottom and up sides of 8-inch-square baking pan, allowing excess to overhang pan sides. Spray foil with nonstick cooking spray.
2. TO MAKE THE CRUST: In workbowl of food processor, pulse graham cracker crumbs, brown sugar and salt; process to combine, ten to twelve 1-second pulses (if large sugar lumps remain, break them apart with fingers). Drizzle butter over crumbs and pulse until crumbs are evenly moistened with butter, about ten 1-second pulses. Press crumbs evenly and firmly into bottom of prepared pan. Bake until deep golden brown, 18 to 20 minutes. Cool on wire rack while making filling. Do not turn off oven.
3. TO MAKE THE FILLING: While crust cools, in medium bowl, stir cream cheese, zest, and salt with rubber spatula until softened, creamy, and thoroughly combined. Add sweetened condensed milk and whisk vigorously until incorporated and no lumps of cream cheese remain; whisk in egg yolk. Add lime juice and whisk gently until incorporated (mixture will thicken slightly).
4. TO ASSEMBLE AND BAKE: Pour filling into crust; spread to corners and smooth surface with rubber spatula. Bake until set and edges begin to pull away slightly from sides, 15 to 20 minutes. Cool on wire rack to room temperature, 1 to 1 1/2 hours. Cover with foil and refrigerate until thoroughly chilled, at least 2 hours.
5. FINALLY: Loosen edges with paring knife and lift bars from baking pan using foil extensions; cut bars into 16 squares. Sprinkle with toasted coconut, if using, and serve. (Leftovers can be refrigerated up to 2 days; crust will soften slightly. Let bars stand at room temperature about 15 minutes before serving.)