Combine your heavy cream, cocoa powder, vanilla extract, and salt in a bowl until the mixture has a mousse texture and its volume has tripled.
If desired, you can add more heavy cream as it is mixing. It should take about 5-7 minutes to reach this creamy consistency.
Cover the mixture and freeze for 20-30 minutes before serving. And voila! Enjoy.
Video
Notes
For this process, you can use an electric hand mixer on medium or a whisk. You will know when the mixture is done when you flip your bowl, and the mixture will stay in place. If this does not happen, keep blending the ingredients at medium speed.
Cover your container with film paper to ensure the mixture stays creamy when served. This step will prevent your chocolate frosty mixture from becoming icy instead of creamy.