1tspeach of dry mustard, dark chili powder, ground chipotle pepper, cumin, white pepper
sea salt and black pepper to taste
In a stove top pan, saute the onions in butter until translucent. Roughly chop the chipotle pepper then add it along with the garlic, Dr. Pepper, crushed tomatoes, tomato paste, molasses, brown sugar, honey and seasonings to the pan.
Simmer for at least 1 hour to allow the sauce to reduce, thicken and intensify in flavor.
Taste and adjust the salt and pepper, then puree in a food processor or blender until smooth.
This sauce can be made up to a week ahead of time. Store in the refrigerator in an airtight container.