01 -
In a medium bowl, mix graham cracker crumbs, granulated sugar, and melted butter until well combined.
02 -
Press the mixture firmly into the bottoms and up the sides of a mini tart pan. Refrigerate for at least 1 hour to set.
03 -
In a large bowl, whisk together sweetened condensed milk, key lime juice, and lime zest until smooth and thick.
04 -
Spoon the filling into the chilled crusts, smoothing the tops with a spatula.
05 -
In a separate bowl, whip the heavy cream and powdered sugar together until stiff peaks form.
06 -
Pipe or spoon the whipped cream onto each mini tart.
07 -
Garnish with additional lime zest.
08 -
Refrigerate for at least 2 hours before serving to allow the pies to set.