Prep the pan and oven. Heat your oven to 300°F (150°C). Line a 12-cup muffin tin with silicone or parchment liners and lightly mist with cooking spray.
This helps the bites release cleanly.
Make the raspberry swirl. In a small bowl, mash raspberries with lemon juice and sweetener until jammy. For a smoother swirl, press through a fine strainer to remove seeds. Set aside.
Soften the cream cheese properly. Ensure the cream cheese is truly soft at room temperature.
This prevents lumps and keeps the batter silky.
Blend the base. In a mixing bowl, whisk or beat the cream cheese until smooth. Add Greek yogurt, sweetener, vanilla, almond extract (if using), lemon juice, lemon zest, and salt. Mix until just combined and creamy, scraping the bowl as needed.
Add the eggs last. Whisk in the egg whites (or egg plus white) on low speed until just incorporated. Do not overmix; too much air creates cracks.
Fill the cups. Divide the batter evenly among the 12 liners, filling each about 3/4 full.
Swirl the raspberry. Spoon about 1 teaspoon of raspberry mixture on top of each cup.
Use a toothpick to gently swirl it into the surface, creating a marbled effect without digging too deep.
Bake gently. Bake at 300°F (150°C) for 16–20 minutes. They’re done when edges are set and centers still jiggle slightly. Avoid browning.
Cool slowly. Turn off the oven, crack the door, and let the bites rest inside for 10 minutes. Then transfer to a rack to cool to room temperature.
Chill to set. Refrigerate for at least 2 hours (overnight is best).
They firm up and develop that classic cheesecake texture.
Finish and serve. Top with a fresh raspberry or a light dusting of powdered sweetener if you like. Enjoy straight from the fridge.