Unsticky Popcorn Balls

Grrrrrgh!
Course : Candy
From: HungryMonster.com
Serves: 8
 

Ingredients:

1 pieces margarine
1 pound miniature marshmallows
1 cup packed brown sugar
1 cup peanut butter
1 1/2 gallons popped popping corn -- air-popped, no oil
 

Preparation:

Melt margarine and marshmallows. Add brown sugar and stir until melted. Add peanut butter and stir until melted. Pour over popcorn. Mix. Shape into balls or any other shape.