Crispy M&M’s are $2 while peanut butter M&M’s are $1.35. Why is there a $0.65 difference between the two? The peanut and plain M&M’s on a shelf below are also $1.35, so there’s something about crispy M&M’s that singles them out. What’s different about them? Anyone who’s ever held a handful of M&M’s on a hot day knows they do melt in your hand. Maybe the crispy M&M’s don’t. I’m thinking of applying for a $3.35 million research grant to study this question.