Martha's Key Lime Squares

Ellen Bales


These seem to me to be a summer-time treat, but I'm sure they are tasty any time of year. With these ingredients, how could they miss?
Recipe by Greg Lofts
Photo by Chris Court


★★★★★ 2 votes

Makes 64 bars
20 Min
1 Hr 10 Min


Add to Grocery List


6 Tbsp
cold unsalted butter, cut into 1/2-inch pieces, plus more, softened, for pan
3/4 c
all purpose flour
3 Tbsp
light brown sugar
1/4 tsp
rounded, course salt
1/2 c
finely shredded dessiccated unsweetened coconut (coconut that is dried to remove moisture)
3 oz
white chocolate, coarsely chopped (about 1/2 cup)


3 large
eggs, room temperature
2/3 c
granulated sugar
3 Tbsp
all purpose flour
2/3 c
fresh key lime juice or regular lime juice
1 Tbsp
confectioners' sugar, for dusting

How to Make Martha's Key Lime Squares


  • 1CRUST: 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.
  • 2Combine the 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 in a preheated 400-degree oven until crust is deep golden brown, 18 to 20 minutes. Remove from oven and reduce heat to 300 degrees.
  • 3FILLING: 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).
  • 4Pour filling over hot crust, and bake until filling is set, about 15 minutes. Let cool completely on a wire rack.
  • 5Run the tip of a knife along the 2 sides of the pan NOT lined with parchment overhang. Transfer to a cutting board, dust with confectioners' sugar, and cut into 1-inch squares. Bars can be stored in an airtight container at room temperature for 2 days.

Printable Recipe Card

About Martha's Key Lime Squares

Leave a Comment

Pinterest Pass Or Fail: Lattice Crust Baked Apples Recipe

Pinterest Pass or Fail: Lattice Crust Baked Apples

Kitchen Crew @JustaPinch

What's better in fall than apple pie? It's filled with quintessential fall flavors. But what to do when you want apple pie, but don't want to make a whole pie?...

8 Cranberry Recipes Popping With Flavor

8 Cranberry Recipes Popping With Flavor

Kitchen Crew @JustaPinch

Cranberries aren't just for sauce anymore. We've found 8 cranberry recipes that shine a spotlight on this tart treat.

6 Recipes To Celebrate Dessert Month

6 Recipes to Celebrate Dessert Month

Kitchen Crew

October is National Dessert Month. Yes, there is a whole month dedicated to what I think I should be considered a meal. Raise your hand if you plan your main...