In your mixing bowl add:
1 cup of peanut butter to 1 cup of milk.
In a separate bowl, combine 1 tablespoon of baking powder with 2 cups of wheat flour. Slowly add these powder ingredients to the peanut butter and milk mixture.
Combine all of the ingredients until thoroughly mixed. Using parchment paper, sprinkle a tiny bit of wheat flour on the surface and roll out the dough to reach your desired dog treat thickness. Using your dog bone cookie cutters, cut out dog treats and place them onto a greased cookie sheet.
Bake at 375 degrees F for 15 -20 minutes.
Optional Corn Starch Icing
Whisk ingredients together thoroughly in a bowl. A thick, paste-like mixture should form. Use a pastry brush to apply to cooled treats.
Dip one end of treat into icing. Rotate dog biscuits until desired coverage is achieved. Top each treat immediately with sprinkles.
*Refrigerate iced treats to avoid spoilage.