Pulse together the powdered milk, stevia, and vanilla in a blender or food processor until powdery, about 1 minute.
While processing, pulse in the coconut oil through the feed tube; pulse a few more times to combine.
Transfer to an airtight jar and store in a cool, dark place for up to 3 months.
Notes
Liquid vs. Powdered Flavorings: I’ve found that using powdered flavorings works better than liquid flavorings for this recipe.
Sourcing Powdered Flavorings: For sourcing powdered flavorings, do a quick Google search or ask at your local health food store or gourmet food store.
Other Flavor Ideas: (Note that with all of the flavor variations listed below, I still include the amount of powdered vanilla that is mentioned in the recipe above.)
Almond: Add 1 teaspoon natural almond powder (this is not the same thing as almond meal or almond flour).
Chocolate: Add 2 tablespoons unsweetened cocoa powder and increase sweetener as desired.
Chocolate Peppermint: Add 2 tablespoons unsweetened cocoa powder, 1 teaspoon natural peppermint flavor powder, and increase sweetener as desired.