Pour the heavy whipping cream into the bowl of a stand mixer (I have this one), or into a large deep bowl if you plan to use a hand mixer.
Set the mixer on the high speed and beat the whipping cream until it begins to look more solid than liquid.
Add the vanilla, cocoa powder, powdered sugar and salt.
Continue beating until the whipping cream resembles stiff peaks when the attachment is pulled out of the whipped cream. Be careful not to over-beat the whipping cream. If you do, the whipped cream will lose it’s structure and not be as stiff.