Slice chicken breasts into thin strips and pat dry with paper towels.
Mix flour, salt, pepper, garlic powder, and paprika in a shallow bowl.
Dredge chicken strips in the flour mixture, coating evenly.
Heat butter and olive oil in a large skillet over medium heat.
Fry chicken strips for 3 to 4 minutes per side until golden and crispy.
Transfer chicken to paper towels to drain excess oil.
Warm taco sauce with brown sugar in a small saucepan until slightly thickened.
Spoon refried beans into each taco shell.
Add fried chicken strips on top of the beans.
Drizzle warmed taco sauce over the chicken.
Sprinkle shredded cheese over the sauce.
Top tacos with fresh pico de gallo.