Preheat a skillet over medium heat and add olive oil.
Season the chicken breasts with chili powder, ground cumin, garlic powder, salt, and pepper.
Cook the chicken in the skillet for 6-7 minutes per side until fully cooked and golden brown.
Remove chicken from skillet and let rest for 5 minutes, then slice into thin strips.
Warm the flour tortillas in a dry skillet or microwave.
Assemble tacos by placing chicken strips on tortillas and topping with shredded lettuce, diced tomatoes, shredded cheddar cheese, and sour cream if desired.
Serve immediately and enjoy your easy chicken tacos!
Notes
For extra spice, add sliced jalapeƱos or a dash of hot sauce. Leftover chicken can be stored in the fridge up to 3 days.