Key Lime Icebox Cake Recipe

If you're searching for the perfect summertime dessert to enjoy by the beach, look no further!

8 to 10 servings
Key Lime Icebox Cake


  • 3/4 cup granulated sugar

  • 1/4 cup cornstarch

  • 1/8 teaspoon kosher salt

  • 4 large egg yolks

  • 2 cups half-and-half

  • 3 tablespoons butter

  • 2 tablespoons Key lime zest*

  • 1/2 cup fresh Key lime juice*

  • 45 graham cracker squares

  • 1 cup whipping cream

  • 1/4 cup powdered sugar


  1. Whisk together first 3 ingredients in a heavy saucepan. Whisk together egg yolks and half-and-half in a bowl. Gradually whisk egg mixture into sugar mixture; bring to a boil over medium heat, whisking constantly. Boil, whisking constantly, 1 minute; remove from heat. Whisk in butter and zest until butter melts. Gradually whisk in juice just until blended. Pour into a metal bowl, and place bowl on ice. Let stand, stirring occasionally, 8 to 10 minutes or until custard is cold and slightly thickened.

  2. Meanwhile, line bottom and sides of an 8-inch square pan with plastic wrap, allowing 4 inches to extend over sides. Place 9 graham crackers, with sides touching, in a single layer in bottom of pan to form a large square. (Crackers will not completely cover bottom.)

  3. Spoon about 3/4 cup cold custard over crackers; spread to edge of crackers. Repeat layers 3 times with crackers and remaining custard, ending with custard; top with remaining 9 crackers. Pull sides of plastic wrap tightly over cake; freeze in pan 8 hours.

  4. Lift cake from pan, and place on a platter; discard plastic wrap. Cover loosely; let stand 1 hour.

  5. Beat whipping cream at high speed with an electric mixer until foamy; gradually add powdered sugar, beating until soft peaks form. Spread on top of cake.

  6. *Regular (Persian) lime zest and juice may be substituted.

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