Steep some lose yerba mate leaves in a teapot (the kind made for loose tea leaves w/ strainer)
Combine the following:
1) 1 cup yerba mate
2) 1/2 teaspoon of pure vanilla extract
3) Stevia (an all- natural 0 calorie sweetener) to taste.
4) 1 teaspoon of organic cream.
5) ENJOY!!
FYI: Cream is not "bad" for you, contrary to the "fat free theories" of the 1980's. Do your research, and you'll find that organic unhomogenized dairy actually has health benefits, not pitfalls. I recommend Kat James' book "The Truth About Beauty" for some fascinating insight into nutrition and beauty.