These Key Lime Cheesecake Bars combine a buttery graham cracker crust with a silky, tangy cheesecake layer brightened by fresh key lime zest and juice. They’re an easy, make-ahead dessert that comes together with minimal prep and delivers the same lively citrus flavor as a classic key lime pie in a more portable bar format.
I first discovered key limes while making a classic key lime pie and immediately fell for their sweet, floral-citrus flavor. Their tiny size makes juicing a little more work, but the flavor payoff is worth it. If key limes aren’t available, regular limes work fine as a substitute — the bars will still be bright and refreshing.
These bars are a riff on traditional cheesecake: a pressed graham cracker crust is baked until golden, then topped with a smooth cream cheese filling flavored with key lime juice, zest, and vanilla. After baking, the bars chill until firm and are finished with a dollop or pipe of whipped cream and extra lime zest for garnish.
The recipe is ideal for warm-weather entertaining because you can prepare it ahead of time. Prep takes about 20 minutes and most of the time is hands-off while the bars bake and chill.
Why you’ll love this recipe
- Quick to prepare: about 20 minutes of hands-on work, then bake and chill.
- Creamy, rich cheesecake filling balanced by bright key lime flavor and a buttery graham crust.
- Flexible: easy to make gluten-free by using gluten-free graham crumbs or cookies.
- Perfect make-ahead dessert for potlucks, barbecues, and holiday gatherings.
Recipe ingredients
This recipe has three simple parts: the graham cracker crust, the cheesecake filling, and an optional whipped cream topping. Use full-fat cream cheese for the best texture and flavor, and bring dairy and eggs to room temperature for a silky filling.
- Graham cracker crumbs: 1 1/2 cups (or use crushed gluten-free crackers to make the crust gluten-free).
- Granulated sugar: a small amount in the crust and more in the filling for sweetness.
- Unsalted butter: melted, to bind the crust and add richness.
- Cream cheese: 16 ounces, softened to room temperature for a smooth filling.
- Sour cream: adds tang and creaminess; plain Greek yogurt is an acceptable substitute.
- Eggs: provide structure and help the filling set.
- Fresh key lime zest and juice: key to the bright citrus flavor; substitute regular lime or lemon if necessary.
- Pure vanilla extract: enhances the overall flavor.
- Whipped cream: optional topping to finish the bars.
See the recipe card below for exact quantities and full instructions.
How to make these easy cheesecake bars
These cheesecake bars are straightforward to prepare. Zest and juice the limes ahead of time if you want to speed up assembly. Bringing ingredients to room temperature will help you avoid lumps and yield a smooth filling.
Pro tip: Soften cream cheese, sour cream, and eggs at room temperature for about an hour before mixing to ensure the creamiest texture.
Prepare the graham cracker crust
Preheat the oven to 350°F (175°C). Line an 8×8-inch square baking pan with parchment paper or foil, leaving an overhang to lift the bars out later. Combine the graham crumbs, sugar, and a pinch of salt, then stir in the melted butter until the crumbs are evenly moistened. Press the mixture firmly and evenly into the bottom of the prepared pan and bake for about 10 minutes, until lightly golden. Remove from the oven and reduce the temperature to 325°F (163°C) while you prepare the filling.
Prepare the cheesecake filling
Beat the room-temperature cream cheese and granulated sugar together until smooth and creamy. Add the sour cream, eggs, key lime zest and juice, and vanilla, then beat just until combined and smooth. Avoid overmixing.
Pour the filling over the pre-baked crust and bake at 325°F (163°C) for about 30–40 minutes, until the edges are set and the center still has a slight jiggle. Remove from the oven and cool on a wire rack. Chill in the refrigerator for at least 3 hours, or overnight, to fully set.
Use the parchment or foil overhang to lift the cheesecake from the pan and slice into bars with a sharp knife. Wipe the knife clean between cuts for neat edges. Serve with whipped cream and extra lime zest or thin lime slices.
Recipe FAQs
Yes. Key limes have a slightly sweeter, more floral flavor, but regular (Persian) limes or even lemons will work and still produce a bright, citrusy bar.
Absolutely. The bars must chill for at least 3 hours to set, so they are an excellent make-ahead dessert for gatherings.
Store bars in an airtight container or wrapped tightly in the refrigerator for 3–5 days. Add whipped cream just before serving for best presentation.
Recipe variations
- Swap the graham crackers for crushed Nilla Wafers or Golden Oreos for a different crust flavor.
- Use gluten-free graham cracker crumbs to make the bars gluten-free.
- Prepare stabilized whipped cream if you need the topping to hold its shape for longer storage or transport.
- For extra citrus intensity, finish the bars with a thin layer of lime curd before whipping or piping cream.
Recipe notes
- Pro tip: Room-temperature dairy and eggs mix more smoothly and help prevent lumps in the filling.
- Zest and juice limes up to a few days ahead and refrigerate to save time on baking day.
- Wait to add whipped cream until serving, or use stabilized whipped cream if making a day ahead.
- Store leftover bars refrigerated for up to 5 days; freeze portions wrapped well for longer storage.
More key lime desserts you’ll love
- Key lime cookies
- Key lime bars
- Key lime fruit dip
Did you try this recipe? If so, leave a review and share how you served the bars. Tag the photos so others can see your results.
Key Lime Cheesecake Bars
Servings: 12 | Prep Time: 20 mins | Cook Time: 20–40 mins | Chill Time: 3 hrs
Ingredients
For the crust
- 1 1/2 cups graham cracker crumbs
- 3 tablespoons granulated sugar
- 1/8 teaspoon salt
- 6 tablespoons unsalted butter, melted
For the filling
- 16 ounces cream cheese, softened to room temperature
- 1 cup granulated sugar
- 4 tablespoons sour cream (or plain Greek yogurt)
- 2 large eggs, room temperature
- 1 1/2 tablespoons key lime zest
- 1/3 cup fresh key lime juice
- 2 teaspoons pure vanilla extract
- Whipped cream, for serving (optional)
Instructions
- Preheat the oven to 350°F. Line an 8×8-inch pan with parchment or foil, leaving an overhang.
- Combine crust ingredients, press firmly into the pan, and bake 10 minutes. Reduce oven to 325°F.
- Beat cream cheese and sugar until smooth. Add sour cream, eggs, lime juice and zest, and vanilla; mix until combined.
- Pour filling over the crust and bake 30–40 minutes, until the edges are set and the center is slightly jiggly.
- Cool on a wire rack, then chill at least 3 hours. Lift from pan, slice into bars, and top with whipped cream and extra lime zest before serving.
Notes
- Zest and juice limes ahead of time to save prep time.
- For the cleanest slices, use a sharp knife warmed under hot water and wiped dry between cuts.
- Bars keep refrigerated for 3–5 days.
Nutrition (approx.)
Per bar: ~247 kcal; Carbs: 27 g; Fat: 15 g; Protein: 3 g. Values are estimates for guidance only.