Costco cocoa bombs are a TikTok hit

Costco sells cocoa bombs — hollowed-out spheres of chocolate, filled with marshmallows, sprinkles and other treats. When submerged into a cup of hot milk, the bomb releases its contents to make a gooey treat. For those who aren't Costco members, a host of TikTok videos have popped up offering viewers ways to make their own cocoa bombs at home.