Use unsweetened natural peanut butter. Will not use peanut butter that contains xylitol as it is toxic to dogs. The recipe will come courtesy of King Arthur friend Elaine Aukstikalnis, who will work within a veterinary Business; Elaine often bakes these biscuits (which have been "vetted because of the vet") https://martinoziyn.newsbloger.com/34830198/examine-this-report-on-probiotic-dog-snacks