From Epicurious via Reddit
Ingredients
5 tablespoons unsalted butter
1 tablespoon honey
1 cup graham cracker crumbs (from about 8 crackers)
1 (8-ounce) package cream cheese, softened
1 (14-ounce) can sweetened condensed milk
3 tablespoons finely grated key lime zest, divided
1/3 cup fresh key lime juice
2 tablespoons fresh lemon juice
3/4 cup chilled heavy cream
2 tablespoons powdered sugar
Instructions
1. Melt butter and honey in a small saucepan over medium heat or in a microwave-safe bowl. Pulse graham crackers in a food processor until fine crumbs form. With the motor running, drizzle in butter-honey mixture and process until well combined. Transfer mixture to a medium bowl; set aside.
2. Using an electric mixer on high speed, beat cream cheese in a large bowl until creamy, about 3 minutes. Add condensed milk and beat until smooth. Add key lime juice and lemon juice and beat to combine. Beat in 2 Tbsp. key lime zest.
3. Using a whisk or electric mixer on medium-high speed, whip cream in another medium bowl to very soft peaks. Sprinkle powdered sugar over cream and continue to whip until it holds stiff peaks. Gently fold 1/2 cup cream into key lime mixture; cover remaining cream and chill.
4. Line muffin pan with paper liners. Pour key lime mixture into a pastry bag or plastic bag with the corner snipped off and pipe batter evenly into tins. Top each with 1 1/2 Tbsp. cracker crumb mixture, breaking up crumbs to completely cover, then press down gently to adhere. Freeze until set, at least 3 hours.
Remove pies from molds, turn upside down, and remove paper liners. Spread reserved cream over pies and top with remaining 1 Tbsp. key lime zest.