Prep the pan: Line an 8x8-inch baking pan with parchment, leaving overhang for easy lifting. Preheat oven to 325°F (163°C).
Make the crust: Stir together almond flour, cocoa powder, powdered sweetener, and a pinch of salt.
Mix in melted butter and vanilla until it looks like damp sand.
Press and par-bake: Press the crust evenly into the lined pan. Bake 8–10 minutes until set. Let it cool slightly while you make the filling.
Beat the cream cheese: In a mixing bowl, beat softened cream cheese until smooth and fluffy.
Scrape the bowl so there are no lumps.
Sweeten and flavor: Add granulated sweetener, cocoa powder, vanilla, and salt. Beat until well combined and creamy.
Add eggs and cream: Beat in eggs one at a time on low speed, then mix in heavy cream just until smooth. Do not overmix—that can add air and cause cracks.
Pour and smooth: Pour the filling over the crust. Tap the pan gently on the counter to pop any air bubbles.
Bake: Bake at 325°F (163°C) for 20–25 minutes, or until edges are set and the center has a slight jiggle.
The top should look matte, not wet.
Cool gradually: Turn off the oven, crack the door, and let the pan rest for 10 minutes. Then remove and cool to room temperature.
Chill: Refrigerate at least 3 hours, preferably overnight, until fully set.
Add chocolate topping (optional): Melt sugar-free dark chocolate with a little coconut oil or butter until smooth. Spread a thin layer over the chilled cheesecake.
Chill 20–30 minutes to set.
Cut into bites: Use the parchment to lift the slab onto a cutting board. Warm a sharp knife under hot water, wipe dry, and cut into small squares.