Can I use chicken breasts instead of thighs?
Thighs are recommended because they stay moist during braising and render fat for the tortillas. Breasts will be drier and you'll need to source fat separately.
How do I render chicken fat from the thighs?
Cook the skin-on thighs in a pot with 1 tbsp olive oil over medium heat, skin-side down, until fat renders and skin crisps (about 8-10 minutes). Reserve the rendered fat and crispy skin for the tortillas and topping.
Can I make the tortillas ahead?
Yes. Roll and stack tortillas between parchment, wrap in plastic, and refrigerate up to 2 days. Reheat in a cast-iron skillet over medium heat for 30 seconds per side before serving.
Where do I find dried guajillo chiles?
Most supermarkets carry them in the Latin or international aisle. They're milder than chipotles, with a slightly fruity flavor. Toast them dry in a skillet for 30 seconds before soaking to deepen flavor.
Can I substitute the serrano pepper?
Jalapeño works as a milder substitute; use 1.5 for similar volume. For more heat, keep the serrano or add a pinch of cayenne to the salsa.