Make an easy gluten-free frozen key lime pie with a rich chocolate cookie crust and a creamy, refreshing fresh lime filling.
Creamy, tangy, and wonderfully refreshing, this Easy Gluten-Free Frozen Key Lime Pie with Chocolate Crust combines a silky citrus filling with a rich chocolate cookie crust. The balance of tart lime, sweetened condensed milk, fluffy whipped cream, and chocolate makes every bite bright, cool, and indulgent.
Unlike a traditional baked key lime pie, this frozen version has a light, mousse-like filling. Freshly whipped cream is gently folded into sweetened condensed milk, lime juice, and lime zest, creating a smooth texture that softens beautifully before serving.
Choose a baked chocolate crust for a crisp, toasted finish or use the convenient no-bake method when you want to keep preparation simple. This make-ahead gluten-free dessert is an excellent choice for spring gatherings, summer barbecues, birthdays, holidays, and warm-weather entertaining.
Directions
Step 1: Prepare the Pan
If you plan to bake the chocolate crust, preheat the oven to 350°F. Set aside a 9-inch pie plate or springform pan.
For the no-bake crust, no oven preparation is necessary.
Step 2: Crush the Chocolate Cookies
Place the gluten-free chocolate sandwich cookies in a food processor. Pulse until the cookies become fine, evenly sized crumbs.
Transfer the chocolate cookie crumbs to a medium mixing bowl.
Step 3: Mix the Chocolate Crust
Add the granulated sugar and packed brown sugar to the cookie crumbs. Stir until the ingredients are evenly combined.
Pour the melted butter over the crumb mixture. Use a fork to mix thoroughly, making sure all the crumbs are evenly moistened. The finished mixture should resemble wet sand and hold together when pressed.
Step 4: Form the Crust
Transfer the chocolate crumb mixture to the 9-inch pie plate or springform pan.
Use the bottom of a measuring cup to press the crumbs firmly and evenly over the bottom of the pan. Use your fingers to press the mixture up the sides, creating a compact crust with an even thickness.
Step 5: Bake or Chill the Crust
For a baked crust, place the pan in the preheated oven and bake for 10 to 13 minutes, or until the crust is set and fragrant. Remove it from the oven and allow it to cool completely before adding the filling.
For a no-bake crust, place the prepared crust in the refrigerator or freezer for 10 to 20 minutes, or until firm.
Step 6: Whip the Cream
Pour the heavy whipping cream into a large mixing bowl.
Using a hand mixer or stand mixer fitted with the whisk attachment, beat the cream until soft peaks form. The whipped cream should hold its shape while remaining smooth and light. Be careful not to overwhip it.
Step 7: Prepare the Lime Mixture
In a separate mixing bowl, combine the sweetened condensed milk, freshly squeezed lime juice, and freshly grated lime zest.
Stir until the mixture is completely smooth and the lime juice and zest are evenly incorporated.
Step 8: Make the Key Lime Filling
Gently fold the lime mixture into the whipped cream. Continue folding just until the ingredients are evenly combined.
Avoid vigorous stirring, which can deflate the whipped cream. The finished key lime filling should remain smooth, airy, and fluffy.
Step 9: Assemble the Pie
Spoon the key lime filling into the completely cooled or chilled chocolate crust.
Use a spatula to spread the filling evenly, smoothing the top without pressing out too much air.
Step 10: Freeze the Pie
Place the assembled pie in the freezer for at least 2 hours, or until the filling is firm enough to slice.
For convenient entertaining, prepare the pie in advance and keep it covered in the freezer until you are ready to serve it.
Step 11: Soften and Serve
Remove the pie from the freezer 15 to 20 minutes before serving. This brief softening period gives the filling a creamier, mousse-like consistency.
Slice and serve the pie chilled. If desired, garnish each serving with additional lime zest, thin lime slices, or freshly whipped cream.
Notes
For a stronger citrus flavor, increase the freshly grated lime zest from 1 teaspoon to 2 teaspoons.
Freshly squeezed lime juice provides the brightest flavor and is recommended instead of bottled lime juice.
Regular Persian limes work well in this recipe. If fresh key limes are available, use them for a more traditional key lime flavor. You may need additional key limes because they are smaller and produce less juice.
Allow a baked crust to cool completely before adding the filling. A warm crust can soften the whipped filling and prevent it from setting properly.
When making the no-bake version, press the crust firmly into the pan so it holds together when sliced. Chilling or freezing the crust before filling also helps it become more stable.
Do not overwhip the heavy cream. Softly whipped cream folds more easily into the lime mixture and creates a light, smooth filling.
Fold the filling gently to preserve as much air as possible. Overmixing can make the filling denser.
For clean slices, dip a sharp knife in warm water and wipe it dry before every cut.
If you prefer a softer pie, transfer it from the freezer to the refrigerator for about 30 minutes before serving.
Store leftover pie covered in the freezer for up to one week. Let each serving soften slightly before eating.
For a decorative finish, add fresh lime zest, lime slices, or whipped cream shortly before serving.
When serving someone with celiac disease or gluten sensitivity, check the labels on the chocolate sandwich cookies, sweetened condensed milk, and all other packaged ingredients for appropriate gluten-free labeling. Prevent cross-contact by using clean preparation surfaces, utensils, equipment, and serving tools.
