Susan seemed very enthusiastic about them, which abated some of her fears. And she saw people eating them all the time, so she thought that they couldn't be all that bad.
"I guess I could," she said, taking one and holding it gingerly between her thumb and forefinger. "Is it just spicy? I like spicy food..." It was mainly the fire part that made her hesitant. Even after five years in the wizarding world, she wasn't entirely used to the things that magic could get people to do. "The fire doesn't hurt, right?" she asked, inspecting it.