There are dozens of recipes in which honey is cooked over direct heat, and none of them are toxic. There are Greek finikia, soaked in an aromatic, spiced honey syrup, halvah made with honey cooked to the soft crack stage, and taiglach, little balls of baked dough soaked in a boiled honey syrup and formed into cakes. There are probably hundreds of other recipes that use cooked honey, all without developing any toxins.