More Please Popcorn Mix

Preheat oven to 250°F. Grease large roasting pan. Mix cereal & popcorn in roasting pan.

Combine brown sugar, butter, & corn syrup in medium saucepan. Bring to a boil over medium heat, stirring constantly. Boil, without stirring, for 5 minutes. Remove from heat; stir in vanilla & baking soda. Pour evenly over cereal mixture; stir to coat evenly.

Bake for 45 minutes, stirring every 15 minutes. Cool completely in pan, stirring frequently to break apart mixture. Stir in chocolate chips. Store in airtight container.