Makes: 2 cups

1 ounce butter
1 tablespoon oil
1/2 cup chopped onions
1 stick sliced celery
1/2 cup diced green pepper
1 teaspoon minced garlic
1 tablespoon flour
1 cup tomato puree
1/2 teaspoon thyme
2 bay leaves
1 teaspoon chili powder
1/4 teaspoon cayenne pepper
1/4 teaspoon black pepper
1/2 teaspoon Worcestershire sauce
1 cup chicken stock

Combine butter, oil in a 2qt-saucepan. Add onions, celery, green pepper and cook until vegetables are tender.
Stir in flour. Add remaining ingredients.
Simmer for15 to 20 minutes.
Adjust seasoning if necessary. Use for shrimp creole and other creole dishes.