Caramel Corn

7 qt Popped popcorn
2 c Brown sugar
1 c Butter
Vanilla
1/2 c Corn syrup
1 ts Salt
1/2 ts Soda

Boil sugar, butter and corn syrup 4 minutes. Remove from stove and add salt, soda and vanilla. (This will foam when soda is added). Pour over popped popcorn, stir carefully. Put into a large pan into oven at 250F. for 1 hour. Carefully stir every 10 minutes. If pan is big enough, shake popcorn--it doesn't crumble as much.