Key Lime Cheesecake Bars

These Key Lime Cheesecake Bars are bright, creamy, and perfectly balanced between sweet and tart. The buttery graham cracker crust gives a toasty, slightly crunchy base that contrasts beautifully with the silky, tangy cheesecake filling. Expect a smooth, velvety texture, a fresh citrus aroma from the lime juice and zest, and a clean finish that leaves you wanting another bite. These bars are ideal for backyard gatherings, potlucks, or a simple weeknight dessert when you want something impressive without a lot of fuss. If you like a no-fuss lime dessert, you might also enjoy no-bake mini key lime pies for a portable, single-serve option.

Ingredients

• 12 full-sheet graham crackers, crushed into fine crumbs. The base of the crust, provides sweet, wheaty flavor and crunch.
• 6 tablespoons unsalted butter, melted. Binds the graham crumbs and adds richness to the crust.
• 1/4 cup granulated sugar. Adds sweetness to the crust and helps it set.
• 4 ounces full-fat brick cream cheese, softened. The primary ingredient for the creamy cheesecake filling.
• 4 large egg yolks. Contribute richness and help set the filling.
• 14-ounce can of sweetened condensed milk. Sweet, thick milk that creates a smooth, custardy filling.
• 1/2 cup key lime juice. Gives bright, tangy citrus flavor. Fresh is best if available.
• 2 teaspoons lime zest. Concentrated lime aroma and zing.
• Optional for garnish: whipped cream and lime slices. Adds creaminess and a decorative touch.

For a different crust idea, see this variation using a crescent dough crust in our crescent cheesecake bars.

Step-by-Step Instructions

1. Preheat and prepare. Preheat the oven to 350°F (177°C). Line a 9-inch square baking pan with parchment paper so the bars lift out easily after chilling.
2. Make the crust. In a bowl, mix the graham cracker crumbs, granulated sugar, and melted butter until evenly moistened. Press the mixture firmly and evenly into the bottom of the prepared pan to form the crust. A flat-bottomed measuring cup helps compact it.
3. Prebake the crust. Bake the crust in the preheated oven for 10 minutes. This helps set the foundation so the filling does not make the crust soggy.
4. Beat the cream cheese. In a separate bowl, beat the softened cream cheese until smooth and free of lumps. This step prevents a grainy filling.
5. Add egg yolks. Add the egg yolks one at a time, mixing well after each addition so the mixture stays silky.
6. Combine remaining filling ingredients. Gradually mix in the sweetened condensed milk, key lime juice, and lime zest until the filling is smooth and homogeneous. Scrape the bowl sides as needed.
7. Bake the bars. Pour the filling over the prebaked crust and spread it evenly. Bake for 18 to 20 minutes until the filling is set but still slightly jiggly in the center.
8. Cool and chill. Allow the pan to cool on a wire rack for 30 minutes. Then refrigerate for 2 to 3 hours before slicing to ensure clean cuts and proper texture.
9. Serve. Remove from the pan using the parchment, slice into bars, and serve chilled. Garnish with whipped cream and lime slices if desired.

For tips on working with cheesecake fillings and baking times, you may find helpful techniques in our carrot cake bars with cheesecake swirl post.

Recipe Details

• Prep Time: 15 minutes active, plus 30 minutes cooling, plus 2 to 3 hours chilling.
• Cook Time: 10 minutes crust prebake, plus 18 to 20 minutes filling bake.
• Total Time: About 3 hours 15 minutes to 4 hours, including chilling.
• Servings: Makes about 16 bars, depending on slice size.
• Calories: Approximately 215 calories per bar.

If you enjoy other cheesecake bar flavors, try these caramel apple cheesecake bars for a seasonal twist.

Tips, Storage & Variations

• Tips
  • Soften the cream cheese to room temperature for easier mixing and a smoother filling.
  • Press the crust firmly and evenly to avoid a crumbly base when slicing.
  • Use a sharp knife warmed in hot water and wiped dry between cuts for neater slices.
• Storage
  • Refrigerate leftovers in an airtight container for up to 4 days.
  • For longer storage, wrap the pan tightly in plastic wrap, then aluminum foil, and freeze for up to 2 months. Thaw in the refrigerator overnight before serving.
• Variations using only the ingredients provided
  • Make mini bars in a muffin or mini-square pan using the same mixture, reducing bake time slightly until centers are just set.
  • Press some crust up the sides of the pan for a thicker edge and a different bite.
  • Serve each bar with a dollop of the optional whipped cream and a thin lime slice for a classic finish.
    For an apple inspired cheesecake bar alternative using similar techniques, see this other caramel apple cheesecake bars entry.

FAQ

1. How do I know when the bars are done baking?

• The bars are done when the edges are set and the center is slightly jiggly but not liquid. They will firm up as they chill.

2. Can I use regular lime juice instead of key lime juice?

• Yes, regular lime juice works. The flavor will be slightly different but still bright and tangy.

3. Do I need to prebake the crust?

• Prebaking for 10 minutes helps the crust hold its shape and prevents sogginess from the filling.

4. Why is my filling grainy?

• Graininess often comes from cold cream cheese. Make sure the cream cheese is fully softened and beat it until smooth before adding other ingredients.

5. Can I make this ahead of time?

• Yes, make the bars a day ahead and refrigerate them. They hold well and the flavors meld nicely.

People Also Ask

1. What is the difference between key lime and regular lime in desserts?

• Key limes are more floral and tart, giving desserts a distinctive, sharper lime flavor compared to regular limes.

2. Can I use low-fat cream cheese or reduced fat condensed milk?

• Using low-fat versions will change the texture and richness. The bars may be less creamy and slightly softer.

3. Why use egg yolks only, not whole eggs?

• Egg yolks add richness and help create a dense, custard-like texture without extra firmness from egg whites.

4. How should I cut clean slices from chilled cheesecake bars?

• Chill well, use a hot, dry knife, wipe clean between cuts, and make decisive strokes for neat edges.

5. Will the crust be soggy if I skip the prebake?

• Skipping the prebake increases the risk of a soggy crust because it does not have the chance to set before the filling is added.

6. Can I double the recipe for a larger pan?

• You can double the ingredients for a larger pan, but baking times may change. Monitor the filling until set.

Conclusion

These Key Lime Cheesecake Bars deliver a simple, bright dessert with creamy texture and a buttery graham base. They are easy to make, travel well, and show beautifully on a dessert table. For additional inspiration and variations on lime bars, check out Entertaining with Beth’s Key Lime Cheesecake Bars and Sally’s guide to a similar bar in Easy Key Lime Pie Bars. Give this recipe a try, and please share how your bars turn out so others can enjoy them too.