Start with chicken that can stay juicy after shredding
Chicken thighs makes sense for home cooks because thighs stay forgiving after poaching, shredding, and one more round of heat inside the tortilla. A lean breast-only filling can work, but it reaches the dry zone faster once the shell is frying around it.
The filling also does not need to be overloaded with liquid. A little cooked tomato, onion, jalapeno, and salt gives the chicken enough flavor without turning it into a saucy mixture that weakens the tortilla from the inside.
If you are using leftover shredded chicken, fix the seasoning first and check the moisture second. You want savory, loose strands that hold together when rolled, not a wet spoonful that seeps out during frying.


