Gather all your ingredients and place them on your countertop for easy access.
In your blender, combine the milk or nondairy creamer and silken tofu. Blend on high until the mixture is creamy and smooth, about 30-60 seconds.
Next, add the salt, pure vanilla extract (or vanilla bean seeds), and your chosen sweetener. Blend again until everything is fully incorporated and the mixture is silky.
Taste your frosty and adjust the sweetness if necessary. You can add more sweetener according to your preference and blend again.
Pour the Vanilla Protein Frosty into your serving glasses. You can add some ice cubes if you prefer it extra chilled.
For a fun presentation, consider garnishing with a sprinkle of cinnamon or a few fresh berries on top. Enjoy your frosty treat right away!