Keto Cheesecake Recipe with Allulose and Sour Cream for Smooth Texture

You don’t need to give up cheesecake to stay low carb.

This keto cheesecake holds its own beside any classic version. Dense, creamy, clean-flavored, and confidently sweet without that artificial aftertaste some sugar-free desserts carry.

In this post, you’ll learn how to make a no-fuss low carb cheesecake with simple ingredients, minimal equipment, and one small twist that makes the texture silkier than anything you’d expect from a sugar-free dessert.

It took me several test runs and notes in the margins of my Pin Notebook to finally get here. The almond flour crust? Crisp without crumbling. The filling? Velvety but structured. The magic? I’ll get to that shortly.

Keep reading.

Keto Cheesecake with Almond Flour Crust and Sour Cream Filling

This recipe starts with almond flour, melted butter, and a low carb sweetener. Once pressed into a springform pan and baked, the crust creates a nutty, golden base that holds its shape even after slicing.

You’ll notice the sweetener blends right into the butter without clumping. That’s what you want.

For the filling, full-fat cream cheese and sour cream create the base. I always use the brick kind, never whipped. Let it soften completely on the counter before mixing. If it’s even slightly cold, the batter won’t smooth out fully and you’ll end up with lumps. I’ve learned that the hard way.

Vanilla extract and a tiny bit of lemon juice round out the flavor. The lemon isn’t overpowering—just brightens the tang of the cream cheese. It’s optional, but I never skip it.

The sea salt might seem small, but it sharpens the overall balance. Don’t leave it out.

Keto Cheesecake Recipe Tips for a Smooth Texture

You’ll add eggs one at a time and mix slowly. No rushing here. Overmixing pulls too much air into the batter. That’s what causes cracks. I’ve made that mistake on busy days when I was distracted.

Once the batter is ready, pour it over the cooled crust and smooth the top. Gently tap the pan on the counter to pop any trapped air bubbles. You want the surface even and dense.

I use a water bath about half the time. It depends on how much I need to multitask. With or without it, this recipe holds together, but the water bath helps if your oven runs hot or uneven.

Bake until the edges are set and the center still jiggles slightly. Then let it cool in the oven with the door cracked. This step stabilizes the structure and prevents sudden shrinkage.

Allulose vs. Erythritol: What’s Better for Keto Cheesecake?

Here’s what I’ve found.

Erythritol works, but it can leave a slight cooling sensation. That sharp tingle on your tongue? That’s erythritol.

Allulose doesn’t do that. It melts smoothly and behaves more like sugar when baked. For cheesecakes, that means a softer mouthfeel and a cleaner finish.

If you’ve had grainy or icy-textured keto desserts before, it was probably the sweetener. For this recipe, I go with powdered allulose every time. I don’t even test it anymore. The result is worth it.

Let It Chill: Patience Makes It Better

Once baked and rested, let the cheesecake cool completely before refrigerating. Four hours is the minimum. Overnight is best.

That time firms the texture, melds the flavors, and makes slicing easier. I usually make it the night before guests come over or for Sunday meal prep so it’s ready by the next day.

The texture? Soft-set, like classic cheesecake. No wobble, no collapse. Just creamy richness in every bite.

And now, the twist I hinted at.

My Secret Ingredient for the Creamiest Keto Cheesecake

Sour cream.

It adds tang, yes, but more than that, it smooths the batter and gives it that signature cheesecake mouthfeel.

Without it, the filling feels too heavy. With it, the flavor lifts. That one addition is the difference between dense and dreamy.

It’s not a fancy trick. Just something I’ve learned after baking this same cheesecake at least fifteen times, always with little tweaks noted next to a butter-smeared page in my Pin Notebook.

Want More Sugar-Free Cheesecake Inspiration?

This Peach Cheesecake keeps it fruity without added sugar.

My Apple Cheesecake uses cinnamon and almond flour for a fall twist that works any time of year.

For no-bake lovers, No Bake Strawberry Cheesecake is quick and light.

Craving something bold? Try Matcha Cheesecake or go deep with Red Velvet Cheesecake.

And if you love layers, Tiramisu Cheesecake might just be your next favorite.

Save This Keto Cheesecake Recipe for Later and Share Your Version

This keto cheesecake recipe brings creamy texture, clean sweetness, and structure without sugar.

Pin it to your Keto Desserts Easy board or Low Carb Cake Recipes to find it later. It fits just as well under Keto Sweets Easy or Low Carb Cheesecake Recipe, whichever board keeps your kitchen organized.

I’d love to know if you try it. Do you use allulose or erythritol? Crust tweaks? Flavor additions? Let me know in the comments. We’re all figuring this out together, one cheesecake at a time.

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Yield: 12 servings

Keto Cheesecake Recipe

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This creamy keto cheesecake uses simple ingredients to create a smooth, rich dessert without the sugar. A crisp almond flour crust complements the tangy, velvety filling made with cream cheese, sour cream, and a low-carb sweetener. The texture is soft and set, with a clean finish that keeps the focus on the cheesecake's classic flavor. Chill thoroughly before serving for best results.

Prep Time 20 minutes

Cook Time 55 minutes

Additional Time 4 hours

Total Time 5 hours 15 minutes

Ingredients

• FOR THE CRUST
• 1 ½ cups almond flour
• ¼ cup powdered allulose or erythritol
• 5 tablespoons unsalted butter, melted
• FOR THE FILLING
• 24 ounces full-fat cream cheese, softened
• 1 cup powdered allulose or erythritol
• 3 large eggs, room temperature
• ½ cup full-fat sour cream
• 1 tablespoon fresh lemon juice (optional)
• 1 teaspoon vanilla extract
• ¼ teaspoon fine sea salt

Instructions

1. PREPARE THE CRUST: Preheat the oven to 325°F (163°C). In a medium bowl, combine almond flour, sweetener, and melted butter. Mix until evenly moistened. Press the mixture firmly into the bottom of a greased 9-inch springform pan using your hands or the back of a spoon to create a compact, even layer. Bake for 10 minutes, then remove from the oven and let cool while you prepare the filling.
2. MAKE THE FILLING: In a large mixing bowl, beat the softened cream cheese on medium speed until completely smooth and free of lumps. Gradually add the sweetener and continue mixing until incorporated. Add eggs one at a time, mixing on low speed just until blended. Scrape down the sides of the bowl as needed.
3. FINISH THE BATTER: Add sour cream, lemon juice (if using), vanilla extract, and salt. Stir gently or mix on low speed until the mixture is uniform and smooth, being careful not to overmix to avoid incorporating excess air.
4. ASSEMBLE THE CHEESECAKE: Pour the filling over the cooled crust and smooth the top with a spatula. Gently tap the pan on the counter a few times to release air bubbles. If desired, wrap the outside of the springform pan in foil and place it in a larger pan filled with about 1 inch of hot water for a water bath.
5. BAKE THE CHEESECAKE: Place the pan in the oven and bake for 50 to 60 minutes. The outer edges should look set while the center still has a slight jiggle when gently shaken. Turn off the oven, crack the oven door open, and let the cheesecake cool inside for 1 hour.
6. CHILL AND SERVE: After cooling in the oven, remove the cheesecake and let it cool to room temperature. Transfer to the refrigerator and chill for at least 4 hours, preferably overnight, before slicing and serving.

Notes

Use full-fat cream cheese and sour cream for the best texture. Allulose melts smoothly and avoids the cooling sensation some sweeteners can cause. Avoid overmixing the batter to reduce the risk of cracks. A water bath is optional but can help with even baking.

Nutrition Information:

Yield:

12

Serving Size:

1
Amount Per Serving: Calories: 373Total Fat: 34gSaturated Fat: 16gTrans Fat: 0gUnsaturated Fat: 15gCholesterol: 122mgSodium: 266mgCarbohydrates: 10gFiber: 2gSugar: 3gProtein: 8g