Ben & Jerry's is banning two scoops of the same flavour in its 26 Australian stores as part of a push for marriage equality Down Under.

"It is time to stand up for fair and equal rights for all by letting our leaders know that we demand Marriage Equality!", the popular ice cream chain said on Thursday.

"Imagine heading down to your local Scoop Shop to order your favourite two scoops of Cookie Dough in a waffle cone," the company wrote in a statement.