mix-in

noun

Etymology: Deverbal from mix in.

1. Alternative form of mixin.
2. A dessert of ice cream with another ingredient mixed in.
3. An ingredient intended to be mixed into a food.

   “Cans of jalapeno-flavored tuna appeared on store shelves along with low-fat tuna mix-ins to make mayonnaiseless tuna salad.”

   “Pour in your choice of chocolate or vanilla, organic bases from Blue Marble, add mix-ins from an array of 25, and in less than 10 minutes your soft serve is ready.”