Name: Key Lime Mousse {Key Lime Pie in a Jar}
Prep time: 15 min
Total time: 1 h 15 min
Yield: 4
Cuisine: American
Ingredients: 1 cup graham cracker crumbs; 6 tablespoons salted butter; ¼ cup granulated sugar; ¼ cup key lime juice (fresh or bottled); 14 ounces sweetened condensed milk (1 can); 1 ¼ cup heavy whipping cream; ¼ cup powdered sugar; 1 tsp vanilla extract

Key Lime Mousse {Key Lime Pie In A Jar}

Creamy, delectable Key Lime Mousse is a perfect summer dessert—layers of graham cracker crust, tangy lime filling, and fluffy whipped cream!

Prep15 min

Total1 hr 15 min

Serves4

Published 19 Jun 2025

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Creamy, delectableKey Lime Mousseis seriously the perfect summer dessert! This no-bake key lime pie in a jar is ready in minutes and features layers of graham cracker crust, tangy lime filling, and fluffy whipped cream. Perfect for summer entertaining and meal prep.

A mason jar filled with key lime mousse featuring a crumbly graham cracker crust, creamy filling, and whipped topping, with a fresh lime placed beside the jar.

🍋‍🟩 This key lime mousse requires zero oven time, making it perfect for hot summer days when you want a refreshingdessert without heating up your kitchen. Simply mix, layer, and chill for an effortless treat!

My 2 Best Tips For Making Key Lime Mousse

Use Room Temperature Ingredients:Allow your condensed milk and lime juice to come to room temperature before mixing. This prevents the mixture from seizing up and ensures a smooth, creamy texture in your key lime mousse.

Don’t Skip the Chilling Time:While it’s tempting to dive in immediately, proper chilling time is crucial for the layers to set and the flavors to blend together. The graham cracker crust needs time to firm up, and the lime filling benefits from the resting period.

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This delightful key lime mousse recipe transforms the classic key lime pie into individual, portable treats that are perfect for any occasion!

With layers of buttery graham cracker crust, creamy lime filling, and fluffy whipped cream, these no-bake desserts capture all the flavors of traditional key lime pie in a convenient mason jar format.

These key lime mousse jars can be prepared up to a week in advance, making them excellent for meal prep or party planning. You can evenfreeze them for up to three monthsfor longer storage.

Recipe FAQs

Can I use regular limes instead of key limes for this mousse?

Yes! While key limes are smaller and sweeter than regular limes, you can substitute regular lime juice. You’ll need about 2 regular limes to get ¼ cup of juice, compared to 3 key limes. The flavor will be slightly more tart, but equally delicious.

Can I make this recipe without mason jars?

Yes! You can use any small glasses, ramekins, or even make one large dessert in a trifle bowl. Just cover with plastic wrap if your containers don’t have lids. The key is having clear containers to show off the beautiful layers.

Can I freeze the key lime mousse jars?

Yes, these freeze beautifully for up to 3 months. When ready to serve, simply transfer from freezer to refrigerator and let thaw completely before enjoying. The texture will be just as creamy as fresh.

More Dreamy No Bake Dessert Recipes To Try

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Key Lime Mousse {Key Lime Pie in a Jar}

Creamy, delectable Key Lime Mousse is seriously the perfect summer dessert! This no-bake key lime pie in a jar is ready in minutes and features layers of graham cracker crust, tangy lime filling, and fluffy whipped cream. Perfect for summer entertaining and meal prep.

Ingredients

Instructions

Melt the butter in the microwave and combine it in a medium sized bowl with the graham cracker crumbs and granulated sugar. Use a fork to mix the ingredients until the mixture resembles wet sand.

In a separate bowl, whisk together the key lime juice and sweetened condensed milk. Set aside.

In a third mixing bowl, use an electric hand mixer to whisk the heavy cream, powdered sugar, and vanilla together until the cream forms stiff peaks (or use a Kitchen Aid mixer!)

Press a few spoonfuls of the graham cracker mixture into 4 separate 8 oz wide mouth mason jars. Top the graham cracker layer with the key lime mixture, leaving about ¼ of the jar empty.

Spoon the whipped cream over the key lime layer and place the lids on the mason jars. Allow the jars to chill in the fridge for one hour before serving.

Notes

Serving Idea: I like to serve these pie jars with a sprinkle of fresh lime zest and/or a sprinkle of graham cracker crumbs. Use Smaller Jars: If you do not have 8 oz mason jars, you can use any small glass and just cover them with plastic wrap when storing them. You can also make them smaller if you want. Sometimes I'll do 8 smaller servings from this recipe. Lime Juice Tips: Key limes are a smaller, sweeter version of a lime. While most people opt to use regular limes in their key lime pie, you will have a sweeter, less tart dessert if you use key limes. ¼ cup lime juice is the equivalent of 2 regular limes or 3 key limes. Storage: These no bake pie jars will last for up to one week in the fridge. Alternatively, you can store these jars in the freezer for up to 3 months. Simply allow the jar to thaw in the fridge before serving it if you choose to store them this way.

Equipment

8 ounce wide mouth mason jars with lids

Electric hand mixer

Nutrition

Calories894

Carbohydrates93

Cholesterol163

Fat55

Fiber1

Protein12

Saturated fat34

Sodium420