Muffet is a supporting character in Undertale, making her first appearance after Frisk makes their way into Hotland. She is a baker that sells spider-themed pastries for unusually high prices (9999 gold), but for a good cause. She serves as a sub-boss towards the end of the game. Muffet is a minor antagonist and mini-boss in the indie RPG game Undertale. She is a spider monster who runs a bake sale charity for other spiders. At the same time, she is also hired by Mettaton to kill Frisk and turn in their SOUL in exchange for a generous amount of money.