Prep the pan: Line a 24-cup mini muffin pan with paper liners. Preheat oven to 325°F (163°C).
Make the crust: In a bowl, mix almond flour, powdered sweetener, and salt.
Stir in melted butter and vanilla until it looks like damp sand and clumps when pressed.
Portion and press: Divide crust mixture among liners (about 1 heaping teaspoon each). Press firmly with a spoon or the bottom of a measuring spoon to compact.
Par-bake crust: Bake 6–7 minutes until edges look set and lightly golden. Remove and cool while you make the filling.
Beat the cream cheese: In a large bowl, beat softened cream cheese on medium speed until very smooth and fluffy, 1–2 minutes.
Scrape the bowl.
Add sweetener and flavor: Beat in powdered sweetener, vanilla, lemon juice, lemon zest, and salt until smooth.
Add eggs and sour cream: Mix in eggs one at a time on low speed just until combined. Gently beat in sour cream. Do not overmix—too much air can cause cracks.
Fill the cups: Spoon or scoop the batter over the crusts, filling each liner nearly to the top.
Tap the pan gently to level.
Bake: Bake 12–15 minutes. The centers should look set at the edges but still slightly wobbly in the middle.
Cool gradually: Turn off the oven, crack the door, and let the bites sit 5 minutes. Transfer the pan to a rack and cool to room temperature.
Chill: Refrigerate at least 2 hours, preferably overnight, to fully set and develop flavor.
Finish and serve: Add a small dollop of whipped cream, a berry, or a light chocolate drizzle if you like.
Peel off the liners and enjoy.