Edible Markers: Certified kosher black food coloring markers, 1.5g food coloring per marker. Black Edible Marker Pen: Food coloring pens contains approved edible food coloring, can be used on most dry foods for marking and dating eggs. Edible Pens for Cookie Decorating: Fine tip black marker for coloring works great for outlining and other fine detail decorating cookies and cakes. Edible Ink Markers: Decorators edible food markers write on most smooth dry surfaces, such as marshmallows, fondant, dried icing. Edible Black Marker: Does NOT write on cake pops, candy melts and chocolates or any fat based product. food safe markers, edible food markers, edible markers for cake decorating, food safe marker, edible ink pen, edible markers for chocolate, edible markers for cookies, easter egg markers, food grade markers, cookie markers edible, edible cookie markers, black food marker pen edible, cookie pens, food safe markers edible, frosting pens for cookies, cookie decorating markers, fine tip edible markers for cookies, edible food marker, food coloring markers edible, edible pens for decorating, black food marker, cookie pens edible, edible pens for food, food markers for cookies, edible markers for food, food color pen, food writer edible markers, cookie marker, cookie markers. Yes, these edible food markers can work on bread, but they perform on dry and smooth surfaces like fondant, royal icing, cookies, or dried frosting. On soft bread, the color may spread slightly depending on the moisture.