caramel churro chex mix

the goods:

4 and 1/2 cups rice chex cereal

4 and 1/2 cups corn chex cereal

1 cup packed brown sugar

1/2 cup (1 stick) butter

1/4 cup light corn syrup

1/4 teaspoon baking soda

2/3 cup granulated sugar

2 teaspoons ground cinnamon

Preheat oven to 350 degrees. Place cereal in a large heat safe bowl. Line a large rimmed baking sheet with foil and spray with nonstick cooking spray. In a small bowl combine cinnamon and sugar and set aside.
In a heavy saucepan over medium heat, combine brown sugar, butter, and corn syrup. Cook until the mixture comes to a boil. Let boil for 1 minute, stirring constantly, then remove from heat and stir in baking soda. Pour over cereal and stir until cereal is coated. Spread cereal on prepared baking sheet. Sprinkle evenly with cinnamon/sugar mixture. Bake for about 5 minutes, then flip with a spatula and bake for 3 more minutes, until cereal turns golden brown. Remove from oven and let cool completely, then break up and store in an air-tight container.