Combine All Goodness: Grab a spacious mason jar and carefully pour in the heavy cream, your chosen granulated sweetener, unsweetened cocoa powder, and vanilla extract.
Shake It Up: Securely fasten the lid onto the mason jar. Now, give it a good, vigorous shake for about 5 minutes until everything is well combined and slightly thickened. This aeration helps create a smooth texture!
Chill to Perfection: Place your sealed jar (or transfer the mixture to a metal bread pan for easier scooping later) into the freezer. For a delightful soft-serve texture, freeze for about 3 hours. If you prefer a firmer, scoopable ice cream, let it freeze overnight. Remember to let it sit out for 5-10 minutes before scooping if it's extra firm!