Step 1

In a shallow dish, combine flour, 1/2 teaspoon salt, and 1/4 teaspoon pepper; mix well.

Step 2

In a large skillet over medium heat, heat oil and melt 1 tablespoon butter. Coat chicken on both sides in flour mixture.

Step 3

Saute chicken 3 to 4 minutes per side, or until golden. Remove to a plate. Add remaining butter, the onion, and mushrooms to skillet and saute 5 minutes, stirring occasionally. Add wine, broth, garlic powder, remaining salt and pepper, and remaining flour mixture, and whisk until smooth and sauce begins to thicken.

Step 4

Return chicken to skillet and cook 3 to 4 minutes, or until no longer pink in center and heated through. Serve topped with sauce.