Celery Wine Baked Chicken

INGREDIENTS

• 1 tablespoon butter
• 1/4 cup sliced fresh mushrooms
• 1 (10.75 ounce) can condensed cream of celery soup
• 1/4 cup finely chopped celery
• 1/2 cup sour cream
• 1/4 cup green bell pepper, chopped
• 1/4 cup dry white wine
• 4 skinless, boneless chicken breast halves
• 1 pinch paprika
• 1 pinch garlic powder
• 1 pinch ground black pepper
• 2 teaspoons butter, divided