Nope, u ain't able to change the spread, not even opting for a pure kaya version as the buns arrived in ready-form at each outlet accordingly. I disregard the kaya butter ones as I find the butter seems to get soaked up in steamed, turning it soggy and damped! So I chose a kaya peanut version but the peanut oil was overpowering and the kaya was less generous here. I gave up on peanut!