I am quite surprised to know that there is a black version of muah chee!
This stall called "Hougang Six Miles Famous Muah Chee" located inside Gourmet Paradise Food Court at Toa Payoh HDB Hub sells exactly that. The black element is actually due to the crushed black sesame seeds coating its exterior.
Of course, they do sell the usual crushed peanut version as well.
Here, the muah chee are individually hand pulled from a larger dough then dipped in shallot oil before being tossed into a bed of crushed peanuts or black sesame.
Compared to other vendors who simply place a blob of the dough into the tray of crushed peanuts and then snipping them into smaller pieces with scissors, Hougang Six Miles Famous Muah Chee's muah chee is way more chewy due to the extra stretching.