Place mixing bowl and whisk of stand mixer into the freezer for 10 minutes until super cold. Mix gelatin with water and let it bloom for approx. 5 minutes. Place heavy cream in the cold mixing bowl and add powdered sugar and salt.
Start on low speed (or it will splash everywhere!) and gently increase speed as the cream starts to come together. Meanwhile, place bloomed gelatin in the microwave for 15–20 seconds until it is melted but not overly hot.
When the cream is whipped, reduce the speed to medium and drizzle the room temperature gelatin near the side of the mixing bowl while continuing to run the whisk. As the gelatin works its way through the cream, turn up the speed to high and whisk until it is completely whipped.
Notes
Make-ahead time-saver tip: stabilized cream will stay fluffy and fresh covered in the refrigerator for as long as the expiration date on the heavy cream carton!