In a blender, combine the cream, sweetener, vanilla, salt, and cacao powder. Blend until completely smooth.
Add the kefir last and blend briefly—just enough to combine, to avoid damaging any probiotics.
If you don’t have an ice cream maker, pour the mixture into a shallow dish and freeze, stirring occasionally as it hardens to break up ice crystals and create a smoother texture. If you do have an ice cream maker, churn the mixture according to the manufacturer’s instructions until thick and creamy.
Transfer the ice cream to a lidded container and freeze for at least 2–3 hours to firm up before serving.
Video
Notes
-*If using a sweetener other than allulose (honey, maple syrup, cane sugar, etc.), use 3/4 cup for every 1 cup of allulose (as allulose is less sweet).