Black Cherry and Tart Cherry Juice work amazing, but feel free to experiment! Just be sure to choose juices with no added sugar.
* Liquid sweetener can easily be made by mixing 1 part Stevia powder with 1 part tap water.
For example: 1 cup water + 1 cup dry Stevia. Keep a quart in your fridge at all times as your go-to sugar-free sweetener!