Start by measuring out all your ingredients. This makes the process smoother and ensures you don’t miss anything.
Preheat your oven to 350°F (175°C). This will ensure your Frito Snack Mix gets nice and toasty.
Line a large baking sheet with parchment paper. This will prevent the mix from sticking and make cleanup a breeze.
In a large mixing bowl, combine the Fritos, Rice Chex cereal, pretzel twists, and mixed nuts. Stir gently to ensure everything is evenly distributed.
In a medium saucepan, melt the butter over medium heat. Once melted, add the brown sugar and corn syrup. Stir continuously until the mixture bubbles and thickens, about 2-3 minutes.
Pour the hot butter mixture over the dry ingredients in the mixing bowl. Use a wooden spoon or spatula to mix everything together until all the pieces are coated.
Transfer the mixture onto the prepared baking sheet, spreading it out evenly. This will ensure even baking and crisping.
Bake in the preheated oven for 15-20 minutes, stirring halfway through to ensure even toasting. You want it golden brown, so keep an eye on it.
Once baked, remove the snack mix from the oven and let it cool completely. After it’s cooled, gently mix in the mini M&Ms.
Transfer your Frito Snack Mix to a serving bowl or store it in an airtight container. Enjoy it as a snack or share it with friends!