Preheat oven to 425 degrees F. Line a baking sheet with foil.
In a medium bowl, whisk together apple butter, brown sugar, apple cider vinegar and Dijon; set aside.
In a large bowl, combine wings, vegetable oil, brown sugar, garlic, onion and chili powder, paprika, salt and pepper, to taste.
Place wings onto prepared baking sheet and baste apple butter glaze on one side of the wings. Place into oven and bake for 25 minutes, using metal tongs to turn at halftime and basting with apple butter glaze on other side of wings.
To make the dipping sauce, whisk together sour cream and Sriracha.
Serve wings immediately with dipping sauce, if desired.