Pressure Cooker (Instant Pot) Key Lime Pie (2024)

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This Instant Pot Key Lime Pie is an easy, creamy pie with a graham cracker crust and a zesty lime custard filling that’s perfect for summer.

❤️ Why You’ll Love This Recipe: This custardy pie is rich and creamy in the center with a crisp, sweet graham cracker crust. It bakes to perfection in an Instant Pot and has minimal clean-up and a few simple ingredients.

If you’re looking for a sweet treat that you don’t have to turn the oven on for, your Instant Pot / pressure cooker is the answer. And this tangy, bright key lime pie hits all of the right notes. It’s a long-time favorite in my family, plus it’s quick and easy to make.

Update: I’m making this recipe all summer long, so I wanted to update the post with new photos and tips for perfect key lime pie.

How to Make Instant Pot Key Lime Pie

There are two components to this simple pie: a three-ingredient crust and the key lime custard filling.

Make the crust first. While it chills, you can mix together the filling. Then “bake” everything in your pressure cooker.

You’ll need to use a sling to lower the filled cake pan into the pressure cooker and remove it safely. See here for how to make your own sling with aluminum foil.

Graham Cracker Crust

The first thing to do for your pie is make the three-ingredient graham cracker crust. You can make the crust in a food processor or just in a mixing bowl. Just be sure to break down the crackers into a coarse meal so they hold together.

You don’t need to pre-bake the crust. However, it’s best to freeze the shaped crust for about 10 minutes before adding the filling. This helps keep everything firmly together.

Tip: For a crisper crust, the filling should be higher than the crust in the pan. This way, no moisture gets into the crust during cooking.

Key Lime Pie Filling

I adapted this filling recipe from my Key Lime Pie with Mango Sauce recipe on Barbara Bakes.

For the Instant Pot version, I’ve made the custard filling even creamier by adding sour cream. It adds a wonderful tangy flavor that makes the cake almost cheesecake-like.

Tip: If you can’t find key limes, you can get a similar flavor by combining 1/4 cup lemon juice with 1/4 cup lime juice.

Decorating and Serving the Pie

For a classic look, you can decorate your key lime pie with homemade meringue. Or, keep things simple with dollops of homemade (or store-bought) sweetened whipped cream.

This pie is best served cold, so it’s a great make-ahead dessert. And refreshing for summer!

More Instant Pot Dessert Recipes

If you’re on a mission to not turn on your oven this summer, give these other pressure cooker desserts a try instead:

• Tropical Mini Cheesecakes are adorable single-serving treats with a cookie crust and a tangy tropical filling.
• Meyer Lemon Cheesecake is dense, fruity and full of bright citrusy flavor like this key lime pie.
• Instant Pot Pumpkin Pie is another dense custard pie that’s easy to make in an Instant Pot for holidays.

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