Enchilada Sauce

Bahan-bahan (28 porsi)

• ¼ cup vegetable oil
• ¼ cup all-purpose flour
• ¼ cup chili powder
• 1 teaspoon garlic powder
• 1 teaspoon onion powder
• 1 teaspoon cumin
• ½ teaspoon dried oregano
• 30 ounces tomato sauce (two 15 ounce cans)
• 3 cups chicken broth