These treats are not only fun for the holidays, but the fresh mint can also freshen up your pup's breath, so he or she is ready to mingle at the season's many social gatherings. NOTE: Just be sure to use fresh mint leaves. Extracts and oils can be too strong for pets.
Preheat your oven to 350 degrees and line a baking sheet with parchment paper.
Whisk together the flour(s), powdered milk, and baking powder. Then whisk the eggs into the chicken broth. Add the wet ingredients to the dry ingredients, stir until combined, and knead into a dough. You may want to add extra flour, a teaspoon at a time, if the dough is too sticky. Divide the dough into two parts and let it rest for a moment while you complete the next steps.
Make a paste with the mint by chopping it, adding a bit of water, and muddling it with a mortar and pestle. If you don't have a mortar-pestle set handy, use a small metal bowl and the back of a spoon. The amount is so tiny that it doesn't really make sense to use a food processor. And it doesn't have to be a perfect paste. Even finely chopped mint is great.
Knead the mint into one of the dough balls.
Add the pet-safe food coloring to the other ball. NOTE: Pet-friendly dyes are readily available online, but you can also use a touch of beet juice. Think about how beets, which are actually good for dogs, stain your hands!
Roll out your two doughs separately, forming rectangles of approximately the same size. Cut both doughs into strips, and roll the strips into "snakes." Form candy canes by twisting two snakes together and shaping into the traditional form. Beat the remaining egg in a bowl and use a pastry brush to apply egg wash to each cookie.
Bake the cookies for about 12 minutes. You'll want to watch them because cooking time will depend upon thickness. Cool thoroughly before serving to your pet.