Preheat and prep: Heat the oven to 325°F (163°C). Line a 12-cup muffin tin with paper liners. This keeps the crust neat and the cheesecakes easy to lift out.

Mix the crust: In a bowl, stir together 1 1/2 cups almond flour, 3 tablespoons powdered sweetener, a pinch of salt, and 4 tablespoons melted butter until it looks like damp sand. It should clump slightly when pressed.

Press and par-bake: Divide the crust mixture evenly among the liners (about 1 heaping tablespoon each). Press firmly with the back of a spoon. Bake for 7–9 minutes, until lightly golden at the edges. Cool for 5 minutes.

Beat the filling base: In a large bowl, beat 16 ounces cream cheese with 1/2 cup powdered or granulated keto sweetener until smooth and fluffy, about 1–2 minutes. Scrape the bowl so there are no lumps.

Add flavor and creaminess: Beat in 1/3 cup sour cream, 1 teaspoon vanilla extract, and optional 1 teaspoon lemon zest. Mix until silky.

Add eggs gently: Add 2 large eggs, one at a time, mixing on low just until combined. Do not overbeat; too much air causes cracks.

Fill the cups: Spoon the filling over the crusts, nearly to the top. Smooth the surfaces with the back of a spoon for an even look.

Bake until just set: Bake 15–18 minutes. The edges should look set and the centers should still wobble slightly. They’ll firm as they cool.

Cool gradually: Turn off the oven, crack the door, and let the cheesecakes rest for 10 minutes. Then transfer the pan to a rack to cool to room temperature.

Chill to finish: Refrigerate for at least 2 hours, or overnight for best texture. Cold time is when the magic happens and the filling becomes ultra-creamy.

Whip the topping: Whip 1 cup cold heavy cream with 1–2 tablespoons powdered sweetener and 1/2 teaspoon vanilla to soft peaks. Dollop or pipe on top.

Decorate for the party: Add sugar-free sprinkles, a few fresh berries, or a dusting of shaved dark chocolate. Serve chilled.