2 jars cream cheese, softened
8 ounces shredded Swiss cheese
1 (16 ounce) package barbecue sauce mix
1 cup shredded Cheddar cheese
3 (4 ounce) cans sliced mushrooms
2 (1.25 ounce) packages instant French cheese
1 (11 ounce) can whole milk cheese, diced
1/2 cup chopped onion
Place ingredients in a medium bowl. Cover and refrigerate overnight.