Snickers Brownie Bars

Bahan-bahan (16 porsi)

• 1 18 -oz box brownie mix (plus ingredients on back of box)
• 1 7 -oz jar marshmallow crème
• 1 cup creamy peanut butter
• 1 11 -oz package vanilla caramels (about 40)
• 1 tablespoon heavy cream
• 1 cup dry roasted peanuts (or less to taste, roughly chopped)
• 1 cup semi-sweet chocolate chips