This recipe is from Arden Moore's book, Real Food for Dogs. At first the 15x10 pan dimension seemed a bit big for the batter, but it worked out perfectly. 15x10 is the dimension of my jelly roll pan. Made these for my Irish Setter's second birthday party. Frosted with Bow-Wow Brownie Frosting #449129, Bow-Wow Brownie Frosting.