01 -
Heat oven to 250°F. Line a large baking sheet with parchment paper.
02 -
Combine Crispix cereal and pecan halves in a large mixing bowl and set aside.
03 -
Melt unsalted butter in a medium saucepan over medium heat. Add packed brown sugar and light corn syrup. Stir until the mixture is smooth, then bring to a boil while stirring constantly.
04 -
Boil the caramel mixture for 1 minute. Remove from heat and immediately stir in vanilla extract and baking soda until fully incorporated and the mixture foams.
05 -
Quickly pour the hot caramel sauce over the cereal and pecans. Gently toss until the mixture is evenly coated.
06 -
Arrange the coated mixture in a single layer on the prepared baking sheet. Bake for 1 hour, stirring every 15 minutes for even caramelization.
07 -
Allow the mixture to cool completely on the baking sheet. Once crisp, break into bite-sized clusters and store in an airtight container.