Preheat the oven to 350F.
In a large bowl combine flour and the egg. Add peanut butter, water, honey and stir until you have stiff dough. the dough becomes very firm and sticky. you may need to use your hands, or the paddle attachment on your mixer.
2 ½ cups whole wheat flour, 1 egg, 1 cup peanut butter, 1 cup water
On a lightly floured surface, roll out the dough about 1/2 inch thick and use a cookie cutter to make fun shapes. the treats barely spread and rise, so get creative with your shapes.
Bake for 18-20 minutes, until golden. Once done, set aside to cool. (If you have smaller cookies, use less time, otherwise the bottom might burn.)
To make frosting, combine the peanut butter and honey in a microwavable bowl, and heat in the microwave in 15 second increments, stirring in between, until melted.
⅓ cup cornstarch, 2 Tablespoons peanut butter
Add melted peanut butter mixture to cornstarch and stir until just combined.
Slowly add in water 1 Tablespoon at a time until you have reached the consistency that you would like. For a thinner frosting, add more water.
1 Tablespoon honey
Add frosting to a piping bag and pipe designs on top of each dog treat.
Frost treats with the peanut butter/honey mixture for an even more tempting cookie.
Store in an airtight container or give as gifts!