Arrange wings in a greased 15"x10" jelly-roll pan. Bake, uncovered, at 375 degrees for 30 minutes. Drain; turn wings and return to oven for an additional 20 to 25 minutes.
While wings are baking, combine remaining ingredients in a large saucepan. Bring to a boil; reduce heat and simmer, uncovered, for 25 to 30 minutes.
Arrange 1/3 of wings in a large slow cooker; top with one cup sauce. Repeat layers twice. Cover and cook on low setting for 3 to 4 hours; stir gently before serving.