Key Lime Bars

Directions

1. 1
   Preheat oven to 350F.
2. 2
   Make crust: Stir together graham cracker crumbs, sugar, and butter in a small bowl.
3. 3
   Press evenly onto bottom of an 8-inch square glass baking dish.
4. 4
   Bake until dry and golden brown, about 10 minutes.
5. 5
   Let cool completely on a wire rack.
6. 6
   Make filling: Put egg yolks and lime zest in the bowl of an electric mixer fitted with the whisk attachment.
7. 7
   Mix on high speed until very thick, about 5 minutes.
8. 8
   Reduce speed to medium.
9. 9
   Add condensed milk in a slow, steady stream, mixing constantly.
10. 10
    Raise speed to high; mix until thick, about 3 minutes.
11. 11
    Reduce speed to low.
12. 12
    Add lime juice; mix until just combined.
13. 13
    Spread filling evenly over crust using a spatula.
14. 14
    Bake, rotating halfway through, until filling is just set, about 10 minutes.
15. 15
    Let cool completely on a wire rack.
16. 16
    Refrigerate at least 4 hours or overnight.
17. 17
    Make garnish: Cut into 2-inch squares.
18. 18
    Put cream in the clean bowl of an electric mixer fitted with the clean whisk attachment.
19. 19
    Mix on medium-high speed until stiff peaks form.
20. 20
    Garnish bars with whipped cream and a slice of lime.
21. 21
    Ungarnished bars can be refrigerated in an airtight container up to 3 days.