Couque de Dinant are traditional Belgian cookies, famous for their extra-hard texture, so much that they are traditionally given to babies to suck on while they are teething. Their tooth-cracking texture is achieved by baking the cookies at extremely high temperatures (300 °C).
These sweet biscuits consist of only two ingredients - wheat flour and honey in equal amounts. The honey caramelizes and hardens as the biscuits cool down, so it is not recommended to bite into them - they should be broken into pieces and allowed to melt in the mouth.