boil the chicken for 40 minutes, put the butter and salt while boiling the chicken

when chicken is done let's set and cool, when the chicken is cold ,pull chicken from bone, you need to keep 1/2 cup of chicken broth from the chicken.

for the chicken broth pour in a pan. add garlic ,pepper and salt, put the chicken bring to a boil and untill the broth desolve. now you're done

now to make burrito. get you a tortilla, put chicken ,guacamole and sour cream and jalapenos, now fold into a burrito