Gooey Popcorn

4 bags microwave popcorn, popped
1 (16 oz) package mini marshmallows
1 cup butter 

1 1/3 cup sugar
1/2 cup light corn syrup
1 tsp vanilla

Pop popcorn and pour in marshmallows.  Heat rest of ingrideints on stove top once melted and blended, pour over popcorn and marshmallows and gently stir to coat