canola oil
garlic cloves, minced
onion, finely chopped
ketchup
molasses
packed light brown sugar
minced canned chipotle chiles in adobo sauce
distilled white vinegar (or slightly less to taste)
Worcestershire sauce
Kosher salt, to taste
Canola oil, for brushing
to 7 pounds skin-on chicken drumsticks (about 24), patted dry
Kosher salt and black pepper, to taste