Combine all the ingredients , except for the chicken and the mushrooms, in the crockpot and mix very well.
Add the drumsticks trying to turn them all to be covered with the sauce.
Add the mushrooms, cover and set on hight for 4 hours.
After the 4 hours, the sauce will be watery and delicious.
If you want a crispier chicken with a more thick sauce, transfer the chicken and sauce to a pan and pop in 1 350F oven for 15 minutes.
Enjoy with mashed potato and couscous.