If you choose to flavor K, you will need to successfully boil off all fo the water first, so you have K HCL. Then, i would recomend to take your favorite flavor of coolaide, and find it in one of those powder packets at the grocery store. I would just mix a pinch/serving. So, if you have a whole vial to cook off, then when its done, ad about a teaspoon, or to your liking.
Strawbery and blue rasberry work the best!