Pat the chicken pieces dry with paper towels and season evenly with paprika, Italian seasoning, salt, and black pepper.
Heat the olive oil in a large skillet over medium-high heat.
Add the chicken in a single layer, avoiding overcrowding the pan. Cook for 3–4 minutes without stirring, then flip and continue cooking until golden brown and fully cooked through.
Transfer the chicken to a clean plate.
Reduce the heat to medium-low and add the butter to the same skillet.
Once the butter has melted, stir in the minced garlic and cook for about 30–60 seconds until fragrant. Do not let the garlic brown.
Return the cooked chicken to the skillet and toss until every piece is coated in the garlic butter sauce.
Stir in the chopped parsley and, if desired, add the lemon juice and crushed red pepper flakes.
Serve immediately with your favorite side dishes.