I like Chicory coffee my self. I use it in my Keurig daily. The thing is, you have to use the caps from www.my-kap.com
, your favorite coffee, and some used K cups..... Just use the instructions that come with the caps and it works great. I have been doing this for over 7 months.
I generally grind the already ground coffee a bit finer before I fill the K cups.
I use 1 1/2 teaspoons of coffee per K cup.
If you find that the caps leak in your machine (mine doesn't), you might have to get the seals that My-Kap sells.