01 -
Preheat the oven to 250 F. Line two rimmed baking sheets with parchment paper or lightly grease them.
02 -
Add the cereal and pecan halves to a very large heatproof bowl. Toss gently so the nuts are evenly mixed through the cereal.
03 -
In a medium saucepan, combine brown sugar, corn syrup, butter, and salt. Bring to a boil over medium heat, stirring often, then boil for 2 minutes until smooth and glossy.
04 -
Remove the pan from the heat. Stir in the vanilla, then stir in the baking soda. The mixture will bubble and lighten.
05 -
Immediately pour the hot caramel over the cereal and pecans. Fold with a silicone spatula until the pieces are evenly coated.
06 -
Divide the mixture between the prepared baking sheets. Bake for 45 minutes, stirring every 15 minutes, until the coating looks dry and shiny.
07 -
Spread the hot mix into an even layer and cool completely on the pans. Break into clusters and store in an airtight container at room temperature.