Pretzel M&M's from Mars. The craze to cover anything and everything in chocolate may have started with Pretzel M&M's. If so, it's understandable a craze soon followed. The classic flavor and delicate crunch of M&M's is enhanced by a second crunch with a hint of salt. Pretzel M&M's come in 1.14 ounce packages, with 24 packages per box.