We disclose a mold for forming a food product is disclosed. The mold includes a pocket that is capable of receiving an insert. The pocket is circumscribed by a lip. The pocket includes an interference interference structure that interacts with a peripheral wall of an insert. An insert may be a block, a block assembled with a cap, or a block assembled with an electronic device. The insert includes or is adapted to include a mold cavity for receiving and forming the food product. We also disclose a method for installing a food product mold into a mold tool. An insert is inserted into a pocket arranged on a surface of a tool and a compression fit retains the insert in the pocket. After cooling the insert, the insert is installed in the pocket. As the insert warms, it expands to fill the pocket creating a compression fit.
