Preheat the oven to 250 degrees.
Unwrap the foil from the Rolo candy.
Place the pretzels on a large parchment-lined baking sheet, making sure they’re spaced out.
Add a Rolo candy on top of each pretzel.
Carefully place the baking sheet in the oven for 3-5 minutes, or until the chocolate begins to slightly melt.
Remove from oven and immediately add an M&M candy on top of the warm Rolo candy. Optional: add nonpareil sprinkles while the chocolate is warm.
Cool completely before transferring into an airtight container.