Prep the pan. Line an 8x8-inch pan with parchment, leaving overhang for easy lifting.
Preheat your oven to 325°F (163°C).
Mix the crust. In a bowl, stir almond flour, melted coconut oil, sweetener, cinnamon, and salt until the texture resembles wet sand. It should hold together when pressed.
Press and pre-bake. Press the crust firmly into the lined pan in an even layer. Bake for 8–10 minutes until lightly set and just starting to color.
Let it cool while you make the filling.
Beat the cream cheese. In a large bowl, beat softened cream cheese until smooth and lump-free. This step matters for a creamy texture.
Add yogurt and sweetener. Mix in Greek yogurt and your chosen sweetener. Beat until silky and well combined.
Blend in protein and flavor. Add protein powder, cornstarch, lemon juice, vanilla, and salt.
Mix on low until just combined. Scrape the bowl to avoid dry pockets.
Add eggs last. Beat in the eggs one at a time on low. Stop mixing once everything is smooth. Don’t overmix—too much air can cause cracks.
Fill the pan. Pour the batter over the cooled crust and smooth the top with a spatula.
Tap the pan gently to release bubbles.
Bake gently. Bake at 325°F (163°C) for 25–35 minutes. The edges should be set, and the center should still jiggle slightly. Do not overbake.
Cool slowly. Turn off the oven, crack the door, and let the bars sit for 10 minutes. Then remove the pan and cool to room temperature.
Chill to set. Refrigerate for at least 3 hours, preferably overnight.
This step firms the bars and improves the flavor.
Slice and serve. Lift out using the parchment. Slice into 12 bars with a sharp knife, wiping the blade between cuts for clean edges. Add toppings if you like.