Chex Pumpkin Pie Crunch

1/4 cup brown sugar
1 Tbsp pumpkin pie spice
1/4 cup butter
2 tsp vanilla
 2 cups cinnamon chex cereal
2 cups honey nut chex cereal
2 cups chex cereal
8 oz. pecans (cut up)

In a small bowl, mix brown sugar and pumpkin pie spice, set aside.  In small microwave-safe dish, microwave butter on high about 30 seconds or until melted.  Stir in vanilla.  In large microwavable bowl, mix all cereals and pecans.  Pour butter mixture over cereal mixture, stirring until evenly distributed.  Add sugar and spice mixture and stir until coated.  Microwave uncovered on high 5 minutes or until mixture begins to brown, stirring every minute.  Spread onto wax paper or a cookie sheet to cool.  Store in air tight container.  Makes 8 cups.