Chill a large mixing bowl and whisk attachment in the fridge.
Add the water to a heat-safe bowl and sprinkle the unflavored gelatin on top. Let it sit for a few minutes.
Place this bowl over a simmering pan of water until the gelatin is fully dissolved. It only takes 5-7 seconds. Stir the mixture and set it aside to cool
Remove your bowl and whisk attachment from the refrigerator. Combine the heavy whipping cream, powdered sugar and vanilla in the bowl. Whip the mixture building up to a high speed until it thickens and soft peaks form.
Stir about 1 teaspoon of heavy cream into the gelatin mixture.
Now turn the mixer to low. Slowly pour the gelatin mixture into the whipped cream and mix until well combined. Increase the mixer to medium speed and mix until stiff peaks form.
Note - the recipe makes approximately 1.5 - 2 cups.