The Agriculture Department's Food and Safety Inspection Service defines "mixed nuts" as "the food consisting of a mixture of four or more of the optional shelled tree nut ingredients, with or without one or more of the optional shelled peanut ingredients, of the kinds prescribed by paragraph (b) of this section.... When 2 ounces or less of the food is packed in transparent containers, three or more of the optional tree nut ingredients shall be present.... Each such kind of nut ingredient when used shall be present in a quantity not less than 2 percent and not more than 80 percent by weight of the finished food." Nuts can include almonds, black walnuts, Brazil nuts, cashews, English walnuts, filberts, pecans, other suitable tree nuts, and peanut varieties such as Spanish, Valencia, Virginia, "or any combination of two or more such varieties."

†