Step 1

Preheat the oven to 350 degrees F.

Step 2

Place the cereals into a large mixing bowl, tossing to combine.

Step 3

Meanwhile, in a medium sauce pan over medium heat, add the brown sugar, butter, and corn syrup; bring to a simmer and cook one minute. Stir in the baking soda and remove the sauce pan from the heat.

Step 4

Pour the warm brown sugar mixture over the cereal, tossing evenly to coat. Place this mixture onto a rimmed baking sheet that has been covered with foil; spray the foil with nonstick baking spray, then spread the warm cereal mixture over the foil. Bake the cereal mixture, uncovered, on the center rack of the oven for 10 minutes.

Step 5

Remove the baking sheet from the oven and immediately sprinkle the salt over the warm cereal mixture.

Step 6

Cool the cereal mixture for 5 minutes on the baking sheet, then spread it out over a sheet of parchment paper or foil to fully finish cooling.

Step 7

Melt 1/2 cup of the white chocolate chips in the microwave, heating them in 20 second intervals, stirring after each one, until nicely melted and smooth. Drizzle the melted white chocolate over the cereal mixture, then immediately sprinkle the cereal mixture with the remaining 1/4 cup of white chocolate chips and the M & M’s.

Step 8

Cool mixture completely, then break into pieces and store in an airtight container.