Prep the pan: Line a 12-cup muffin tin with paper liners.
Lightly mist the liners with nonstick spray to prevent sticking.
Heat the oven: Set to 325°F (163°C). A moderate temperature keeps the cups from cracking and drying out.
Make the crust: In a bowl, stir 1 cup almond flour, 2 tablespoons granular sweetener, a pinch of salt, and 3 tablespoons melted butter until the mixture resembles damp sand.
Press and pre-bake: Divide the crust mixture evenly among the 12 liners (about 1 tablespoon each). Press firmly with the back of a spoon.
Bake for 6–8 minutes until just set and lightly golden. Cool for 5 minutes.
Beat the base: In a mixing bowl, beat 12 ounces softened light cream cheese with 1/3–1/2 cup sweetener until smooth and fluffy, about 1–2 minutes. Scrape the bowl.
Add protein and yogurt: Mix in 1 cup plain Greek yogurt and 2 scoops (about 50–60 g) vanilla whey or casein-blend protein powder.
Beat on low until just combined to avoid over-aerating.
Flavor it: Add 2 teaspoons vanilla extract, 1/4 teaspoon almond extract, a squeeze (1 teaspoon) lemon juice if using, and a pinch of salt. If the batter seems very thick, beat in 1–3 tablespoons unsweetened almond milk to loosen it to a creamy, spoonable texture.
Add eggs last: Beat in 2 eggs on low speed, one at a time, just until incorporated. Do not overmix.
Fold in 2 tablespoons sugar-free sprinkles if using.
Fill the cups: Divide the batter among the crust-lined wells, filling nearly to the top. Tap the pan gently on the counter to pop any large air bubbles.
Bake: Bake at 325°F for 15–18 minutes, until the edges are set and the centers still have a slight jiggle. They will firm up as they cool.
Cool gradually: Turn off the oven, crack the door, and let the cups sit for 10 minutes.
Transfer the pan to a rack and cool to room temperature, then chill at least 2 hours, preferably overnight.
Finish and serve: Top with a few extra sprinkles before serving. For a bakery look, pipe a small swirl of light whipped cream or a dollop of Greek yogurt mixed with a touch of sweetener and vanilla.