Family Tested & Approved
Combine popcorn, cereals, and peanuts in a large bowl; set aside.
In a large saucepan, combine brown sugar, margarine, and syrup. Bring to a boil, stirring constantly, over medium-low heat.
Once it comes to a good boil, cook for 5 minutes, without stirring.
Remove from heat and stir in vanilla and baking soda until light and foamy.
Pour over popcorn mix and stir until coated.
Spread onto 2 baking sheets that have been sprayed with PAM. Bake at 250 degrees for 45 minutes, stirring every 15 minutes.
Cool completely and store in an airtight container.