1. Combine brown sugar, pepper, onion powder, garlic powder, chili powder, celery salt, cayenne, ketchup, mustard, vinegar, and Worcestershire sauce in medium saucepan.
2. Heat over medium until boiling.
3. Reduce heat and simmer for 30 minutes.
4. After sugar is fully dissolved and sauce has simmered, whisk in canola oil, adding a little at a time, until it is all combined.