just give her butter straight up. DS loves getting a "cut of butter" and he's been getting "cuts of butter" since he was about 10 months old. He just stole the first one, and since then, he's practically a "butter thief."
("butter thief" one of baby Krishna's nick names -- when he was also called Krishna Gopala -- because he used to go around the village and break into ladies kitchens and eat all of the butter. this is why there is a tradition to hang the butter from the rafters in the middle of hte kitchen -- babies will eat it all!).