1-First Step: Make the crust. Start by mixing 1 1/2 cups graham cracker crumbs with 4 ounces melted unsalted butter in a medium bowl. Stir until the crumbs look evenly coated and slightly damp. This mixture should hold together when you press it between your fingers. Set it aside while you make the filling. If you are using whole graham crackers, crush them finely first. A food processor works fast, but a zip-top bag and rolling pin works too. If you want a different crust flavor, you can swap in another cookie crumb that fits your taste.

2-Second Step: Beat the cream cheese until smooth. In a large mixing bowl, add 8 ounces softened cream cheese. Beat it until it looks creamy and there are no lumps. Soft cream cheese blends better, so let it sit at room temperature for a bit before starting. This step helps the final filling stay silky instead of grainy. Once the cream cheese is smooth, scrape down the sides of the bowl. That little bit of extra care helps every bite taste balanced.

3-Third Step: Add the sweetened condensed milk. Pour in the 14-ounce can of sweetened condensed milk and mix until smooth. The mixture should look glossy and thick. This is the base that gives heavenly no-bake mini key lime pies their sweet, rich body. Keep mixing just until blended. Overmixing is not needed here, and a gentle hand keeps the filling light. If you want to make a larger batch for a crowd, you can double the recipe and use multiple pans.

4-Fourth Step: Mix in the key lime juice. Add 3/4 cup key lime juice and mix again until smooth. You will notice the filling start to thicken slightly as the citrus reacts with the dairy. That is exactly what you want. The flavor should taste tangy, sweet, and bright all at once. If fresh key limes are hard to find, bottled key lime juice works very well. Regular lime juice can also work in a pinch, though the flavor will be a little different. Taste the mixture before you fold in the topping if you want to check the tartness.

5-Fifth Step: Fold in the whipped topping. Gently fold in 8 ounces whipped topping until no streaks remain. Use a spatula and slow motions so the filling stays airy. This is what gives the mini key lime pie cups their mousse-like texture. If you prefer homemade whipped cream, whip 1 cup heavy cream with 1/4 cup powdered sugar until stiff peaks form, then fold it in the same way. Either version works well, and both keep the dessert light.

6-Sixth Step: Fill the cups. Spoon the filling into individual silicone cups or paper liners placed inside a muffin tin. Fill each one about 3/4 full so there is room for the crust topping. Smooth the tops lightly if needed. Then sprinkle the remaining graham cracker crumbs on top. Using silicone cupcake molds makes removal easier, but regular cupcake tins work too. Paper liners are also a solid option if that is what you have on hand.

7-Seventh Step: Freeze until set. Place the filled molds on a sheet tray and freeze for about 4 hours, or until firm. If you are making them ahead for a party, they can stay in the freezer for up to 3 to 4 months. Make sure they sit level so the filling freezes evenly. These no bake mini key lime pies need time to firm up fully, so do not rush this part. The freezer does the work while you handle everything else on your list.

8-Eighth Step: Unmold and serve. To release the pies, submerge the outside of the mold in warm water for just a few seconds. Then carefully pop them out and place them graham cracker side down on a serving plate. Add extra whipped topping and key lime slices if you want a pretty finish. The finished pies should look neat, creamy, and bright. They are ready to serve right away after a short thaw, and they hold up well at room temperature for a little while during serving.