Creamy Key Lime Cheesecake with a Graham Cracker Crust
This key lime cheesecake is smooth, tangy, and bakes up with no cracks or fuss. It’s the kind of dessert that tastes like it came from a bakery but fits right into a weeknight baking mood.
A buttery graham cracker crust holds a creamy filling that balances sweet and tart just right. If you’re craving something bright but still rich, this is the one to make.
Why This Cheesecake Works
The filling leans on full-fat cream cheese and a good amount of sour cream to stay dense, silky, and never rubbery. Every bite starts creamy and finishes with a clean, sharp lime note.
I keep coming back to this version because it hits the right spot, tangy enough to wake up your palate but sweet enough to feel like a proper dessert. A water bath does most of the work behind the scenes, keeping the heat gentle so the center sets without puffing or cracking.
Ingredients
- 1 ½ cups graham cracker crumbs: from about 12 full sheets
- ¼ cup granulated sugar: for the crust
- 6 tbsp unsalted butter, melted: salted butter works too, just skip any extra salt
- 16 oz cream cheese, softened: full-fat blocks give the smoothest texture
- ¾ cup granulated sugar: for the filling
- ½ cup sour cream, at room temperature: adds tang and softens the crumb
- 1 tsp vanilla extract
- ¼ tsp fine sea salt
- 3 large eggs, at room temperature: add them one at a time so they blend in evenly
- ½ cup fresh key lime juice: about 1 lb of key limes, or use bottled in a pinch
- 1 tbsp key lime zest: plus extra for garnish
- Whipped cream and thin lime slices: for serving
Variations / Substitutions
- Regular limes: swap in Persian lime juice and zest for a slightly less floral but still bright flavor. The recipe works exactly the same.
- Bottled key lime juice: a practical choice when fresh key limes are hard to find. Reduce the sugar by 1 tbsp to balance the sharper acidity.
- Gluten-free crust: use a gluten-free graham-style cracker or an equal amount of finely ground almond flour mixed with the melted butter.
- Dairy-free option: sub in dairy-free cream cheese and sour cream alternatives, keeping the same quantities. The texture will soften a little but the lime punch stays strong.
If you enjoy citrus desserts, my lemon bars are another favorite that brightens up any table.
How to Make Key Lime Cheesecake
Step 1: Make the Crust
Preheat your oven to 325°F (165°C). Mix the 1 ½ cups graham cracker crumbs, ¼ cup sugar, and 6 tbsp melted butter in a bowl until the mixture feels like wet sand. Press it firmly and evenly into the bottom and about 1 inch up the sides of a 9-inch springform pan.
Bake for 10 minutes. The crust will smell toasty and the edges will look a shade darker. Set it aside to cool while you work on the filling. A simple fork or the bottom of a measuring cup does a neat job packing the crumb layer tight so it doesn’t crumble later.
Step 2: Mix the Filling
In a large bowl, beat the softened 16 oz cream cheese with ¾ cup sugar on medium speed until completely smooth and no lumps remain, about 2 minutes. Scrape the bowl and beat in the ½ cup sour cream, 1 tsp vanilla, and ¼ tsp salt until just combined.
With the mixer on low, add the 3 eggs one at a time, mixing only until the yolk disappears before adding the next. Stir in the ½ cup key lime juice and 1 tbsp zest by hand at the end. The batter will look pale and satiny, dotted with tiny flecks of green zest. Avoid beating on high speed once the eggs go in, too much air can make the cheesecake puff up and crack as it cools.
Step 3: Bake the Cheesecake
Wrap the outside of the springform pan tightly with a double layer of foil so water cannot sneak in. Pour the filling over the cooled crust and smooth the top. Set the pan in a large roasting dish, place it on the oven rack, and pour boiling water into the outer dish until it reaches halfway up the sides of the springform.
Bake for 55 to 65 minutes. The edges will look set and slightly puffed while the center should still wobble like soft jelly when you gently shake the pan. Turn the oven off, crack the door open, and leave the cheesecake inside for 1 hour. After that hour, lift the pan out of the water, peel off the foil, and let it cool completely on the counter. Once cooled, cover and refrigerate at least 6 hours, but overnight is even better. This slow cooldown is what keeps the top silky and crack-free.
Step 4: Slice and Serve
Run a thin knife around the inside edge of the pan, then release the springform sides. Dip a large knife in hot water, wipe it dry, and slice the cheesecake cleanly, wiping between cuts. Top each slice with a dollop of lightly sweetened whipped cream, a scatter of fresh lime zest, and a thin lime slice. Serve cold, straight from the fridge.
Getting a Creamy, Crack-Free Cheesecake
- Bring all your cold ingredients (cream cheese, sour cream, eggs) to room temperature before mixing. Cold ingredients clump up and need longer beating, which whips in too much air.
- Pull the cheesecake from the oven when the center still has a gentle jiggle. It continues to set from residual heat and will firm up perfectly as it chills.
- A reusable silicone pan wrap or slow cooker liner tied over the bottom of the springform makes the water bath step foolproof if foil tears on you.
- For the cleanest slices, warm your knife under hot tap water between each cut. A chilled cheesecake cuts much more cleanly than a room temperature one.
Bake times by pan size:
| Pan Size | Bake Time | Visual Cue |
|---|---|---|
| 9-inch | 55-65 mins | edges set, center wobble |
| 8-inch | 65-75 mins | slightly taller, center wobble a little less |
| 10-inch | 45-55 mins | thinner layer, wobble appears sooner |
Storing Leftover Cheesecake
- Refrigerate: cover the cheesecake tightly with plastic wrap or place slices in an airtight container. It stays fresh for up to 5 days.
- Freeze: wrap individual slices well and freeze for up to 2 months. Thaw overnight in the fridge and add fresh garnish before serving.
Frequently Asked Questions
Can I skip the water bath?
You can, but the cheesecake may develop a shallow crack or a slightly darker top. The texture will still be creamy, just less evenly set around the edges.
Why did my cheesecake crack even with a water bath?
The most common culprits are overmixing the batter, baking it too long, or cooling it too fast. Leaving the cheesecake in the turned-off oven with the door cracked for that full hour prevents a sudden temperature drop.
Can I use bottled key lime juice?
Yes. Nellie & Joe’s is a reliable brand. Bump the sugar down by 1 tablespoon and still zest a fresh lime for the garnish so you get that aromatic pop.
Is this recipe gluten-free adaptable?
Absolutely. Swap the graham crackers for a gluten-free crisp cookie or cracker that crushes into fine crumbs. The butter ratio stays the same.
Key Lime Cheesecake Recipe
Ingredients
Method
- Preheat oven to 325°F. Mix graham crumbs, ¼ cup sugar, and melted butter. Press into a 9-inch springform pan and bake 10 minutes. Cool.
- Beat cream cheese and ¾ cup sugar until smooth. Mix in sour cream, vanilla, and salt. Add eggs one at a time on low speed, then stir in lime juice and zest.
- Wrap pan in foil, set in a roasting dish, and pour boiling water halfway up the sides. Bake 55-65 minutes until edges are set and center wobbles. Turn oven off, crack door, cool inside for 1 hour. Remove from water, cool completely, then refrigerate at least 6 hours.
- Release the pan sides, slice with a hot knife, and serve each slice with whipped cream, extra lime zest, and a lime slice.
