I saw in the comments of this video someone used a nutrabullet to make this.
I substituted erythritol and about 2 oz of cream cheese instead of mascarpone. I also added about 1/8 tsp of xanthan gum for thickness.
After about 20 seconds you will hear the motor speed up as it thickens up and sticks to the sides. I just stopped, and shook it hard to get everything to the bottom, and pulsed it until it speeds up again, Repeat 2 or 3 times, and it’s done. About 1 minute total.
Amazing!