These mini key lime pies deliver all the bright, tangy flavor of a classic key lime pie in a fun, shareable bite-sized form. With a buttery graham cracker crust and a creamy, tart lime filling, they come together with just a handful of simple ingredients and require no fussy slicing or crimping.
Preheat oven to 350°F. Line a 12-count muffin pan with paper or foil liners.
Mix graham cracker crumbs and sugar, then stir in melted butter until moistened. Press about 1 heaping tablespoon into each lined cup.
Bake crusts for 7-8 minutes until lightly golden. Cool slightly on a wire rack, then reduce oven temperature to 325°F.
Beat egg yolks and lime zest with a hand mixer for 2 minutes until pale. Mix in sweetened condensed milk, then slowly add lime juice until smooth.
Spoon filling over cooled crusts, filling almost to the top. Bake at 325°F for 10-12 minutes until set with a slight jiggle in the center.
Cool pies at room temperature for 30 minutes, then refrigerate for at least 2 hours until fully set.
Beat heavy cream and powdered sugar until soft peaks form. Top each chilled pie with whipped cream and a sprinkle of lime zest before serving.
Notes
Use room temperature egg yolks so they blend more smoothly into the condensed milk.
Do not skip the crust pre-bake, as it keeps the base from getting soggy.
Watch the filling closely near the end of baking — it should jiggle only slightly in the center and not brown or puff up.
Let the pies cool completely before chilling for the cleanest slices and texture.
Zest the limes before you juice them, since it is much harder to zest a juiced lime.
Bottled key lime juice works in a pinch, but fresh juice gives the brightest flavor.
Store leftover pies in an airtight container in the refrigerator for up to 4 days.
Add the whipped cream topping only right before serving if you plan to store them longer.
Freeze the unfrosted pies in a single layer, then transfer to a freezer bag for up to 2 months. Thaw overnight in the refrigerator before adding whipped cream.
Avoid leaving the pies at room temperature for more than 2 hours.