These Key Lime Cheesecake Bars combine a buttery graham cracker crust with a smooth, tangy cheesecake layer brightened by fresh key lime zest and juice. They’re simple to prepare, can be made ahead, and are an ideal summer dessert when you want fresh citrus flavor with minimal fuss.
I discovered how special key limes are when I first made a classic key lime pie. The small limes pack a concentrated citrus flavor that is slightly sweeter and more floral than regular limes, and they make desserts pop with fresh brightness.
After years of making mini lemon cheesecakes, I adapted the idea to key limes and created these Key Lime Cheesecake Bars. They start with a press-in graham cracker crust that bakes briefly, followed by a velvety cheesecake filling flavored with key lime zest, fresh key lime juice, and pure vanilla. A light smear or dollop of whipped cream finishes each bar beautifully.
The recipe is forgiving and perfect for make-ahead serving: it takes about 20 minutes of hands-on prep and then a few hours to chill. If you prefer a cooler dessert without baking, consider mini no-bake cheesecakes or other chilled citrus treats.
Why you’ll love this recipe
- Quick to prepare: about 20 minutes of hands-on time and no water bath required.
- Creamy, rich filling balanced by bright key lime flavor and a crunchy graham crust.
- Easy to make gluten-free by using gluten-free graham crackers or cookie crumbs.
- Great make-ahead dessert for parties, potlucks, and warm-weather gatherings.
Recipe ingredients
This recipe has three main components: the graham cracker crust, the cheesecake filling, and the whipped cream topping.
- Graham cracker crumbs: Use pre-made crumbs or crush graham cracker sheets in a food processor. Substitute gluten-free crackers if needed.
- Unsalted butter: Melted and mixed into the crumbs to bind the crust. If using salted butter, reduce or omit added salt.
- Cream cheese: Full-fat cream cheese yields the creamiest result; bring to room temperature before mixing.
- Sour cream: Adds tang and a smooth texture; plain Greek yogurt can be used as a substitute.
- Key limes: Fresh key lime zest and juice give the bars their distinctive flavor. Regular limes or lemons can be substituted if necessary.
- Eggs: Provide structure and help the filling set.
- Vanilla extract: A small amount enhances the overall flavor.
- Whipped cream: For serving—use homemade or store-bought. Stabilized whipped cream holds up longer if making ahead.
Full ingredient quantities are listed in the recipe section below.
How to make these easy cheesecake bars
These bars are straightforward to assemble. Zesting and juicing the key limes a day or two ahead speeds things up. For the smoothest filling, bring the cream cheese, sour cream, and eggs to room temperature before you begin.
Pro tip: Room-temperature ingredients blend more smoothly and help prevent lumps in the cheesecake filling.
Step-by-step instructions are provided below.
Prepare the graham cracker crust
Line an 8×8-inch baking dish with parchment paper or aluminum foil. Combine the graham cracker crumbs, granulated sugar, a pinch of salt, and melted butter. Press the mixture firmly and evenly into the bottom of the pan until compact. Bake at 350°F (175°C) for about 10 minutes, or until the crust is lightly golden. Allow the crust to cool while you prepare the filling.
Prepare the cheesecake filling
Beat room-temperature cream cheese and sugar until smooth. Add sour cream, eggs, key lime juice, zest, and vanilla, and beat until fully incorporated and silky. Pour the filling over the cooled crust and bake at 325°F (165°C) for 30–40 minutes, until the edges are set and the center still has a slight jiggle—the filling will finish setting as it cools.
After baking, cool the pan on a wire rack, then refrigerate for a minimum of 3 hours. Use the parchment or foil to lift the chilled cheesecake from the pan and cut into 12 bars. Wipe a sharp knife with warm water between cuts for clean edges. Top each bar with a spoonful or pipe of whipped cream and a sprinkle of lime zest before serving.
Recipe FAQs
Yes. Key limes are slightly sweeter and more floral, but regular (Persian) limes work well and produce a tangy, bright cheesecake bar.
Absolutely. The bars need a minimum of three hours chilling, so they are well suited to being made the day before serving.
Store the bars in an airtight container or wrapped tightly in the refrigerator for 3 to 5 days. Add whipped cream just before serving for best presentation.
Recipe variations
- Use crushed Nilla Wafers or Golden Oreo crumbs in place of graham crackers for a different crust flavor.
- Make the crust gluten-free by choosing gluten-free graham crackers or cookies.
- Make stabilized whipped cream if you need the topping to hold its shape for longer periods.
- For an extra burst of citrus, serve with a spoonful of lime curd on the side or a thin layer on top of the bars.
Recipe notes
- Pro tip: Bring dairy and eggs to room temperature for the creamiest filling and easiest mixing.
- Zest and juice limes up to a few days ahead and store in the refrigerator for quick assembly.
- Any bright citrus works as a substitute: Persian limes, lemons, or even orange will yield tasty variations.
- If making ahead, wait to add whipped cream until serving, or use stabilized whipped cream if you prefer to top the bars early.
More key lime desserts you’ll love
- Key lime cookies
- Classic key lime bars
- Fresh key lime fruit dip
Did you try this recipe? If so, please leave a review below and tag @flavorthemoments on social media so the author can see your creation.
Key Lime Cheesecake Bars
Servings: 12 | Prep Time: 20 mins | Cook Time: 20 mins | Chill Time: 3 hrs | Total Time: 3 hrs 40 mins
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, room temperature (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
- Homemade whipped cream for serving (optional)
Instructions
Prepare the crust
- Preheat the oven to 350°F (175°C). Line an 8×8-inch square pan with parchment paper or foil.
- In a bowl, combine graham cracker crumbs, 3 tablespoons sugar, and a pinch of salt. Stir in melted butter until crumbs are evenly coated.
- Press the mixture firmly into the bottom of the prepared pan and bake 10 minutes, until lightly golden. Cool on a wire rack. Reduce oven temperature to 325°F (165°C).
Prepare the filling
- In a medium bowl, beat cream cheese and sugar at medium speed until smooth, about 1 minute.
- Add sour cream, eggs, key lime juice, zest, and vanilla. Beat until smooth and fully incorporated.
- Pour the filling over the cooled crust and bake 30–40 minutes, until the edges are set and the center is slightly jiggly. Check starting at 30 minutes.
- Cool completely on a wire rack, then refrigerate at least 3 hours or overnight.
- Lift the chilled cheesecake from the pan using the parchment/foil, slice into 12 bars with a sharp knife (wipe clean between cuts), and top with whipped cream and extra lime zest if desired.
Equipment
- 8×8-inch baking dish
- Parchment paper or aluminum foil
- Mixing bowls and electric mixer or whisk
Nutrition (per bar, approximate)
- Calories: 247 kcal
- Carbohydrates: 27 g
- Protein: 3 g
- Fat: 15 g (Saturated fat: 8 g)
- Sodium: 69 mg
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