Summer vibes call for a tangy key lime pie, but when you’re not up for baking a whole pie (or you just want a cute treat to share), these mini desserts steal the show. This mousse brings the same refreshing zing, with its airy texture and a crunchy oat crumble that’s irresistible on its own. The sweet and tangy blend hits all the right spots for a classic summer treat—it’s the perfect cool bite after sweltering days under the sun.
Quick note on the limes: Key limes pack more punch than regular limes, and they’re worth hunting down for this mousse. Trust us, the effort is totally worth it! 😉
Key Lime Pie Mousse
Ingredients
FOR THE CRUMBLE
- 4 graham crackers
- 3/4 cup rolled oats
- 1/3 cup packed light brown sugar
- 3 tablespoons all-purpose flour
- 6 tablespoons cold butter cubed
FOR THE MOUSSE
- 1 1/2 cups heavy cream
- 1/4 cup powdered sugar
- 1 cup sweetened condensed milk
- 1/3 cup freshly squeezed key lime juice
- 1 teaspoon pure vanilla extract
- Green food coloring optional
- Key lime wedges for garnish
Instructions
- Step 1: Preheat your oven to 350°F. Crush graham crackers into fine crumbs using a food processor. Mix the crumbs in a bowl with oats, brown sugar, and flour. Add cubed butter and blend until the mixture forms small clumps. Spread it evenly on a baking sheet and bake until golden and crisp, about 20 minutes, stirring halfway through. Let it cool.
- Step 2: Whip the heavy cream and powdered sugar in a large bowl until stiff peaks form. Set aside about 1 cup for topping.
- Step 3: In another bowl, mix condensed milk, lime juice, vanilla, and a drop of food coloring (if using). Gently fold this mixture into the whipped cream until just combined.
- Step 4: Assemble the dessert by layering about 1/4 cup of crumble into 4 glasses. Add two spoonfuls of mousse, then repeat the layers of crumble and mousse.
- Step 5: Use the reserved whipped cream to pipe onto the mousse in each glass. Sprinkle any leftover crumble on top and add a lime wedge for garnish.
- Step 6: Keep the desserts chilled until you’re ready to enjoy them.