In a shallow dish, mix flour, garlic powder, salt, and black pepper.
Butterfly the chicken breasts to create 4 even pieces. Coat each piece thoroughly in the flour mixture.
Heat 1 tbsp butter and olive oil in a large pan over medium-high heat.
Cook chicken for 3–5 minutes per side until golden and fully cooked. Remove and set aside.
Reduce heat to medium and add garlic. Sauté for 1–2 minutes until lightly golden.
Pour in chicken stock and scrape up any browned bits from the pan.
Add remaining butter and whisk until melted and combined into a smooth sauce.
Stir in parsley and season to taste.
Let the sauce simmer until slightly thickened.
Return chicken to the pan, spoon sauce over, and cook briefly on low heat.
Serve with extra sauce and a squeeze of lemon juice.
This Garlic Butter Chicken Recipe delivers a rich, velvety sauce that perfectly coats every bite.