Instructions

  1. In a skillet, saute mushrooms and onion in 1/4 cup butter for 5 minutes.
  2. Transfer to an ungreased 2 quart baking dish.
  3. In the same skillet, melt the remaining butter.
  4. Stir in the flour, salt, garlic powder and pepper until smooth.
  5. Gradually stir in chicken broth; bring to a boil.
  6. Cook and stir for 2 minutes or until thickened.
  7. Stir in the sour cream and tomato sauce or ketchup.
  8. Pour over mushrooms.
  9. Cover and bake at 350 for 30 minutes or until bubbly.