Keto Key Lime Cheesecake – Bright, Creamy, and Low-Carb
If you miss classic cheesecake but want to keep carbs low, this Keto Key Lime Cheesecake hits the sweet spot. It’s creamy, tangy, and just rich enough to feel like a special treat. The zesty key lime flavor keeps every bite bright and refreshing.
You’ll get a sturdy almond flour crust, a smooth cheesecake filling, and an optional whipped topping that makes it company-worthy. Best of all, it’s simple to make with pantry-friendly keto ingredients.
Ingredients
Method
- Prep the pan and oven: Heat the oven to 325°F (165°C). Grease a 9-inch springform pan and line the bottom with parchment if you have it.
- Make the crust: In a bowl, mix 2 cups almond flour, 1/3 cup granulated keto sweetener, a pinch of sea salt, and 5 tablespoons melted butter. Stir until the mixture looks like damp sand.
- Press and par-bake: Press the crust mixture firmly into the pan, going slightly up the sides. Bake for 10–12 minutes, until lightly golden. Set aside to cool while you make the filling.
- Soften the cream cheese: Ensure 24 ounces (about 3 bricks) of cream cheese are truly soft. This prevents lumps. If needed, microwave in 10-second bursts until pliable but not warm.
- Mix the filling base: In a large bowl, beat cream cheese with 3/4 cup powdered keto sweetener until smooth and fluffy, about 2 minutes. Scrape down the bowl.
- Add the dairy: Beat in 1 cup sour cream and 2 teaspoons vanilla. Mix just until combined and glossy.
- Lime time: Add 1 tablespoon finely grated key lime zest and 1/2 cup fresh key lime juice. Blend on low. The batter will loosen slightly and smell amazing.
- Eggs last: Add 3 room-temperature eggs, one at a time, mixing on low after each addition until just combined. Avoid overmixing to reduce cracks.
- Prepare a water bath (optional but helpful): Wrap the outside of the springform pan with heavy-duty foil. Place the pan in a larger roasting pan and pour hot water halfway up the sides. This promotes even baking.
- Bake: Pour the filling over the crust. Bake at 325°F for 50–65 minutes. The edges should be set and the center should have a slight jiggle like Jell-O.
- Cool gradually: Turn off the oven, crack the door, and let the cheesecake rest inside for 45 minutes. Then remove and cool to room temperature.
- Chill: Refrigerate for at least 6 hours, ideally overnight. This sets the texture and deepens the flavor.
- Optional whipped topping: Whip 1 cup heavy cream with 2–3 tablespoons powdered keto sweetener and 1/2 teaspoon vanilla to soft peaks. For extra hold, bloom 1/2 teaspoon powdered gelatin in 1 tablespoon cold water, melt it briefly, cool slightly, and drizzle into the cream while whipping.
- Garnish and serve: Spread or pipe whipped cream over chilled cheesecake. Finish with more lime zest or thin lime slices. Slice with a hot, clean knife.
What Makes This Special
This cheesecake balances big flavor with a clean ingredient list. The almond flour crust bakes up crisp and buttery without added sugar.
The filling uses cream cheese, sour cream, and fresh key lime juice for classic cheesecake texture with a citrus twist. A bit of granulated erythritol or your preferred keto sweetener keeps it low-carb without a strange aftertaste. It also sets beautifully, so slices hold their shape.
It’s a make-ahead dessert that actually tastes better the next day.
That means less stress on the day you plan to serve it. And if you don’t have key limes, regular limes work too. You’ll still get that bright, sunny flavor.
Shopping List
- Almond flour (fine blanched, for the crust)
- Unsalted butter (melted, for the crust)
- Granulated keto sweetener (erythritol, allulose, or monk fruit blend)
- Sea salt
- Cream cheese (full-fat, softened)
- Sour cream (full-fat)
- Eggs (room temperature)
- Key limes (for juice and zest; regular limes if needed)
- Vanilla extract
- Powdered keto sweetener (for smoother filling and topping)
- Heavy whipping cream (optional, for topping)
- Gelatin (optional, a pinch to stabilize whipped cream)
- Coconut oil spray or butter (to grease the pan)
- Parchment paper (optional, for easier release)
Instructions
- Prep the pan and oven: Heat the oven to 325°F (165°C).
Grease a 9-inch springform pan and line the bottom with parchment if you have it.
- Make the crust: In a bowl, mix 2 cups almond flour, 1/3 cup granulated keto sweetener, a pinch of sea salt, and 5 tablespoons melted butter. Stir until the mixture looks like damp sand.
- Press and par-bake: Press the crust mixture firmly into the pan, going slightly up the sides. Bake for 10–12 minutes, until lightly golden.
Set aside to cool while you make the filling.
- Soften the cream cheese: Ensure 24 ounces (about 3 bricks) of cream cheese are truly soft. This prevents lumps. If needed, microwave in 10-second bursts until pliable but not warm.
- Mix the filling base: In a large bowl, beat cream cheese with 3/4 cup powdered keto sweetener until smooth and fluffy, about 2 minutes.
Scrape down the bowl.
- Add the dairy: Beat in 1 cup sour cream and 2 teaspoons vanilla. Mix just until combined and glossy.
- Lime time: Add 1 tablespoon finely grated key lime zest and 1/2 cup fresh key lime juice. Blend on low.
The batter will loosen slightly and smell amazing.
- Eggs last: Add 3 room-temperature eggs, one at a time, mixing on low after each addition until just combined. Avoid overmixing to reduce cracks.
- Prepare a water bath (optional but helpful): Wrap the outside of the springform pan with heavy-duty foil. Place the pan in a larger roasting pan and pour hot water halfway up the sides.
This promotes even baking.
- Bake: Pour the filling over the crust. Bake at 325°F for 50–65 minutes. The edges should be set and the center should have a slight jiggle like Jell-O.
- Cool gradually: Turn off the oven, crack the door, and let the cheesecake rest inside for 45 minutes.
Then remove and cool to room temperature.
- Chill: Refrigerate for at least 6 hours, ideally overnight. This sets the texture and deepens the flavor.
- Optional whipped topping: Whip 1 cup heavy cream with 2–3 tablespoons powdered keto sweetener and 1/2 teaspoon vanilla to soft peaks. For extra hold, bloom 1/2 teaspoon powdered gelatin in 1 tablespoon cold water, melt it briefly, cool slightly, and drizzle into the cream while whipping.
- Garnish and serve: Spread or pipe whipped cream over chilled cheesecake.
Finish with more lime zest or thin lime slices. Slice with a hot, clean knife.
Storage Instructions
Keep the cheesecake covered in the fridge for up to 5 days. For longer storage, freeze individual slices without whipped cream.
Wrap each slice tightly in plastic, then foil, and freeze for up to 2 months. Thaw overnight in the fridge for best texture. Add fresh whipped cream and lime zest just before serving.
Benefits of This Recipe
- Low in carbs, big on flavor: Sweetness comes from keto-friendly sweeteners, not sugar.
- Make-ahead friendly: Chill time is built in, so you can prep the day before.
- Customizable: Works with key limes or regular limes, and crust can be tweaked for texture.
- Restaurant-style texture: A gentle bake and slow cool keep it silky and crack-free.
Pitfalls to Watch Out For
- Cold cream cheese leads to lumps: Always start with truly softened cream cheese.
- Overmixing after adding eggs: Too much air can cause cracks and a dry texture.
- Skipping the cool-down: Rapid temperature changes can make the top split.
- Too much sweetener: Erythritol can crystallize if you overdo it.
Stick to the amounts listed and prefer powdered forms for the filling.
- Using bottled lime juice: It’s convenient but can taste flat and bitter. Fresh juice and zest make a big difference.
Variations You Can Try
- Coconut-lime twist: Swap 1/3 of the sour cream for canned full-fat coconut cream and add a few drops of coconut extract.
- Macadamia crust: Replace 1/2 cup of almond flour with finely chopped macadamia nuts for extra richness and crunch.
- No-bake shortcut: Use the same crust, but chill it instead of baking. For filling, beat cream cheese, sweetener, lime, and a bit of gelatin dissolved in hot water.
Chill until set.
- Mini cheesecakes: Press crust into a lined muffin tin and bake for 6–8 minutes. Add filling and bake 18–22 minutes. Faster chill time, perfect portions.
- Allulose option: If you prefer a softer, less granular sweetness, use allulose.
It stays smooth but can brown faster in the crust; bake a minute or two less as needed.
Can I Use Regular Limes Instead of Key Limes?
Yes. Use the same amount of juice and zest. Key limes are a bit more floral and tart, but regular limes still make a bright, delicious cheesecake.
What Sweetener Works Best?
Powdered erythritol or a monk fruit–erythritol blend works well and keeps texture smooth.
Allulose is great too and won’t crystallize, but it can brown quicker in the crust.
How Do I Prevent Cracks?
Use softened cream cheese, avoid overmixing after the eggs, bake low and slow, and cool gradually. A water bath also helps maintain gentle heat and moisture.
Can I Make This Dairy-Free?
It’s possible, but results vary. Use dairy-free cream cheese, coconut cream instead of sour cream, and a plant-based butter in the crust.
Expect a slightly different texture and flavor.
How Many Carbs Per Slice?
Exact macros depend on the brands you use. A typical keto version lands around 5–7 net carbs per slice when cut into 12 pieces, not including optional toppings. Check your labels and calculate based on your ingredients.
Do I Need to Use a Water Bath?
It’s optional, but it gives the most reliable, crack-free top.
If you skip it, place a pan of hot water on the rack below to add moisture to the oven.
Can I Use Greek Yogurt Instead of Sour Cream?
Yes, use full-fat Greek yogurt for a similar tang. The texture will be a touch lighter, and you may need a minute or two less baking time.
Wrapping Up
This Keto Key Lime Cheesecake brings bakery-level flavor without the sugar. It’s bright, creamy, and easy to make ahead for parties or weeknight treats.
With a crisp almond crust and smooth lime filling, it gives you the best of classic cheesecake in a keto-friendly package. Keep fresh limes, a good sweetener, and softened cream cheese on hand, and you can make this anytime a craving hits. One slice, and you won’t miss the sugar at all.
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