Remove .bar .button class from button in footer

i am using the ion-footer-bar because i would like some to appear at the bottom of the page with the background etc and i have some buttons within the footer bar. It appears that buttons that are added within the footer bar are automatically assigned the class .bar .button . is there a way of not doing this? I would like the buttons in the bar to use the button-large class, but this is being overridden because of the .bar .button class.