Averie Cooks

-1 Line a 9×13-inch pan with aluminum foil for easier cleanup and spray with cooking spray; set aside.
-1 To a large bowl, add the pretzels, Chex, M&M's, and stir to combine; set aside.
-1 To a large pot, add the butter, peanut butter, and heat over medium-low heat to melt, stir nearly continuously until melted and smooth.
-1 Add the marshmallows and stir nearly continuously until melted and incorporated.
-1 Pour the marshmallow mixture over the cereal mixture and stir to combine.
-1 Turn mixture out into prepared pan, smoothing the top lightly with a spatula as necessary.
-1 Optionally, evenly sprinkle with 1/4 cup extra M&M's and/or 1/2 cup extra marshmallows.
-1 Allow bars to set up fully before slicing and serving.