These Key Lime Cheesecake Bars are bright, creamy, and perfect for warm evenings or as a refreshing finish to any meal. The tangy key lime flavor sings through a smooth, silky filling that sits on a buttery graham crumb crust. Each bite offers a contrast of textures: a crisp, slightly crunchy base with a velvety, custard-like cheesecake layer that has a gentle jiggle when it comes out of the oven. The aroma is light and citrusy, with fresh lime zest giving a fragrant lift that pairs beautifully with a hint of caramel from the sweetened condensed milk. These bars are ideal for potlucks, summer dinners, or when you want an easy yet elegant dessert. If you enjoy creative cheesecake twists, you might also like the cinnamon roll honeybun cheesecake for a different take on rich, layered desserts cinnamon roll honeybun cheesecake.

Ingredients

• 12 full-sheet graham crackers, crushed into fine crumbs, for a classic crunchy base that bakes up golden and holds the filling well.
• 6 tablespoons unsalted butter, melted, to bind the graham crumbs and add rich, buttery flavor.
• 1/4 cup granulated sugar, to sweeten the crust slightly and balance the tart filling.
• 4 ounces full-fat brick cream cheese, softened, for the rich, creamy cheesecake texture.
• 4 large egg yolks, to add body and a silky mouthfeel to the filling.
• 1 can (14 ounces) sweetened condensed milk, to sweeten and create a smooth, custardy filling without extra sugar.
• 1/2 cup key lime juice, for bright, authentic key lime tartness.
• 2 teaspoons lime zest, for concentrated citrus aroma and flavor.
• Optional: whipped cream and lime slices for garnish, to add creaminess and a pretty finish.

Step-by-step Instructions

1. Preheat and prepare the pan. Preheat the oven to 350°F (177°C) and line a 9-inch square baking pan with parchment paper, leaving some overhang to lift the bars out easily.
2. Make the crust. Combine the finely crushed graham cracker crumbs, 1/4 cup granulated sugar, and the melted 6 tablespoons unsalted butter in a bowl until evenly moistened. Press the mixture firmly and evenly into the bottom of the prepared pan. A small measuring cup works great to compact the crust.
3. Prebake the crust. Bake the crust in the preheated oven for 10 minutes to set and develop a bit of color. Remove from the oven and set aside while you make the filling.
4. Beat the cream cheese. In another bowl, beat the softened 4 ounces full-fat brick cream cheese until smooth and free of lumps. Scrape the bowl as needed for an even texture.
5. Add egg yolks. Add the 4 large egg yolks one at a time, mixing well after each addition so the filling stays smooth.
6. Mix in the remaining filling ingredients. Gradually add the 1 can (14 ounces) sweetened condensed milk, then the 1/2 cup key lime juice and 2 teaspoons lime zest. Mix until the filling is smooth and glossy. Avoid overmixing once the eggs are fully incorporated.
7. Bake the bars. Pour the filling evenly over the prebaked crust and smooth the top. Bake for 18 to 20 minutes, until the edges are set and the center is slightly jiggly when gently shaken.
8. Cool and chill. Let the pan cool at room temperature for 30 minutes, then transfer to the refrigerator and chill for 2 to 3 hours until fully firm.
9. Slice and serve. Use the parchment overhang to lift the chilled slab from the pan, cut into squares, and serve chilled. Garnish with optional whipped cream and lime slices if desired.

Recipe Details

• Prep Time: 15 minutes
• Cook Time: 18 to 20 minutes for the filling, plus 10 minutes to prebake the crust
• Total Time: about 3 hours 45 minutes, including cooling and chilling
• Servings: Makes about 16 bars, depending on how large you cut them
• Calories: Approximately 240 calories per bar, depending on final portion size

For more inspiration on rich cheesecake layers and presentation, see this take on a cinnamon roll inspired cheesecake cinnamon roll honeybun cheesecake.

Tips, Storage & Variations

• Tip: Press the crust firmly and evenly into the pan to prevent a crumbly base when cutting. Chilling the crust briefly before adding the filling can help it hold up better.
• Storage: Store bars in an airtight container in the refrigerator for up to 4 days.
• Freezing: Freeze uncut bars well wrapped in plastic wrap and foil for up to 3 months. Thaw overnight in the refrigerator before slicing. Individual slices can also be frozen between layers of parchment.
• Variation using existing ingredients only: For a more pronounced lime flavor, fold an extra teaspoon of lime zest into the filling before baking. For a slightly sweeter finish, top each chilled bar with a small dollop of whipped cream and an extra sprinkle of lime zest.
• For compact, individual servings and tips on small cheesecakes, check these mini cheesecake ideas mini cheesecake tips.
• For tried and true baking technique ideas that also work for bars and larger cheesecakes, you can review a related approach in this recipe baking technique inspiration.

FAQ

1. How long do these bars need to chill before cutting?
   Allow 2 to 3 hours in the refrigerator so the filling firms up enough for clean slices.
2. Can I use regular lime juice instead of key lime juice?
   Yes, regular lime juice will work and still produce a bright result.
3. Do I need to bake the crust before adding the filling?
   Yes, prebaking the crust for 10 minutes helps set it and prevents sogginess.
4. Why is the center slightly jiggly when done?
   A slightly jiggly center means the filling is set but still creamy; it will firm up while chilling.
5. Can I make these ahead for a party?
   Yes, make them a day ahead and keep chilled until serving.

People Also Ask

1. What is the best way to crush graham crackers for the crust?
   Place crackers in a plastic bag and use a rolling pin, or pulse in a food processor until fine.
2. How do I get smooth cream cheese without lumps?
   Bring cream cheese to room temperature and beat it until fully smooth before adding other ingredients.
3. Will these bars crack like a classic cheesecake?
   No, this recipe yields a custard-like filling that is less prone to cracking than denser cheesecakes.
4. Can I reduce the sugar in the crust?
   The crust uses only 1/4 cup sugar, which balances the tart filling. You can reduce slightly, but texture may change.
5. Is sweetened condensed milk interchangeable with sugar in this recipe?
   No, it provides sweetness and body that granulated sugar alone would not replicate in texture.
6. How should I slice clean bars?
   Chill thoroughly, then run a sharp knife under hot water, dry it, and slice with a single smooth pull for clean edges.

Conclusion

These Key Lime Cheesecake Bars are an easy, elegant dessert that balances creamy sweetness with bright citrus. If you enjoy a light, no-fuss finish to a meal, try this recipe and share the bars with friends and family. For another take on key lime treats that might spark more ideas, see this Key Lime Cheesecake Bars – Entertaining with Beth recipe for inspiration, and compare technique with this Easy Key Lime Pie Bars – Easy Recipe – Sally’s Baking Addiction to explore different approaches. Enjoy baking, and please share your results and any tweaks you make for future readers.