Cajun Made Bar-Be-Que Sauce

Ingredients
- 10 large onions
- 2 cloves garlic
- 1 quart Mazola corn oil
- 1 stick celery
- 1/2 large bell pepper
- 1/2 cup Worcestershire sauce
- 1/4 tsp nutmeg
- 1/4 tsp allspice
- 1/4 tsp cinnamon
- 1 or 2 lemons sliced
- 2 small cans (8 oz each) Hunt's tomato sauce
- 1/2 bottle (14 oz) Hunt's ketchup
- 3 tbsp mustard
- 3/4 cup brown sugar
- salt to taste
Step-by-Step Instructions
- Chop onions and garlic. Heat the corn oil in a large Magnalite pot or heavy-bottomed pot over medium heat. Add onions and garlic and sauté for 2 hours, stirring occasionally, until deeply caramelized and golden brown.
- Add chopped celery and bell pepper and cook for another hour, continuing to stir occasionally.
- Add Worcestershire sauce, nutmeg, allspice, cinnamon, lemon slices, tomato sauce, ketchup, mustard, and brown sugar. Reduce heat to low and cook for an additional 2 hours, stirring occasionally. Salt to taste.
- After cooking, carefully ladle the hot sauce into clean quart jars and seal with new lids while still hot.
- Serve with pork, chicken, beef, or your favorite meat off the barbecue pit. Makes delicious sandwiches.
Common Problems and Solutions
Q: Why do I need to cook the onions for so long?
A: The 2-hour caramelization process breaks down the onions' natural sugars and creates deep, sweet flavor that forms the foundation of this sauce. Don't rush this step - the long cooking time is what makes this sauce special.
Q: Can I reduce the amount of oil?
A: The large amount of oil is needed to properly caramelize 10 onions without burning. Much of it can be skimmed off after the vegetables are cooked if you prefer a less oily sauce.
Q: How long will this sauce keep?
A: Properly sealed in sterilized jars, this sauce will keep for several months in the refrigerator. The long cooking time and acidity help preserve it. Once opened, use within 2-3 weeks.
Tips and Techniques
Use a heavy-bottomed pot like a Magnalite to prevent scorching during the long cooking time. Stir the onions every 15-20 minutes during the initial caramelization to ensure even browning. The sauce will thicken as it cools, so don’t worry if it seems a bit thin while cooking.
Ingredient Substitutions
- Mazola corn oil: vegetable oil or canola oil
- Hunt's ketchup: any brand of ketchup
- fresh lemon slices: 3 tablespoons bottled lemon juice
Equipment Needed
- Large heavy-bottomed pot or Magnalite pot (at least 8 quarts)
- Long-handled wooden spoon for stirring
- Sterilized quart jars with new lids for canning
- Ladle for filling jars
Historical Context
Louisiana cooks have long made their own barbecue sauces, often starting with a base of slowly cooked onions rather than relying on tomato alone. This approach creates a sauce with more depth and complexity than typical store-bought versions.

