Prep your pan: Line a 24-cup mini muffin tin with paper liners. Preheat oven to 325°F (163°C).
Make the crust: In a bowl, mix almond flour, sweetener, cinnamon, and salt. Stir in melted butter and vanilla until the mixture resembles damp sand and holds together when pressed.
Press the crust: Divide the crust mixture evenly among the liners (about 1 tablespoon each).
Press firmly to create a compact base. A flat-bottomed shot glass helps.
Par-bake: Bake crusts for 6–7 minutes until just set and lightly golden at the edges. Cool for 5 minutes while you make the filling.
Beat the cream cheese: In a large bowl, beat softened cream cheese with a hand mixer on medium until smooth and fluffy, about 1–2 minutes.
Scrape down the bowl.
Add sweetener and spices: Beat in the powdered sweetener, pumpkin pie spice, nutmeg (if using), and salt until fully incorporated.
Mix in pumpkin and vanilla: Add pumpkin puree and vanilla. Beat on low until smooth. Scrape the bowl again.
Add eggs: Add eggs one at a time on low speed, mixing just until combined.
Do not overbeat—this helps prevent cracks.
Fill the cups: Spoon the filling over the crusts, filling each liner nearly to the top. Tap the pan gently to release air bubbles.
Bake: Bake at 325°F (163°C) for 14–17 minutes, or until the edges are set and the centers still jiggle slightly. They will firm as they cool.
Cool gradually: Turn off the oven, crack the door, and let the bites sit for 5 minutes.
Transfer to a rack to cool to room temperature.
Chill: Refrigerate for at least 2 hours, preferably overnight, to set and enhance the flavor.
Top and serve: Add a dollop of keto whipped cream and a sprinkle of cinnamon or nutmeg if desired.