What is the filling in these Doo Top Ddok?

Doo Top Ddok is what’s on the label. I assume Doo Top is a brand name. The internet tells me that ddok (aka tteok) can refer to a sweet Korean rice cake. It’s a nice soft sweet chewy rice dough like an ice cream moochi. It’s been rolled in a tan powdered topping which I’ve now learned is likely to be roasted soy bean powder. Inside there is a soft sweet pale peach/pink colored creamy filling with something slightly crunchy like maybe nuts? I’ve had red bean filling before but this is more creamy plus there are nuts but no red bean skin. Some of the rolls are tan, some are green and some are reddish brown but the filling is the same for all.

Any idea what is the delicious creamy filling is made of? And what kind of nuts might have been used?

There is no ingredient list on the label. Just the name Doo Top Ddok and a made in date and price.