Caramel Puffcorn - Popcorn

20 C puff corn (Chester's brand, available at Walmart)
1½ C firmly packed brown sugar
1 C butter
½ C light corn syrup
1 tsp salt
1 Tbsp vanilla extract
1 tsp baking soda

1. Heat oven to 200°F

2. Place puff corn into large roasting pan; set aside.
3. Combine brown sugar, butter, corn syrup and salt in 3-quart saucepan. Cook over medium heat, stirring occasionally, 8-10 minutes or until mixture comes to a full boil. Continue cooking, stirring occasionally, 5 minutes.

4. Remove from heat; stir in vanilla and baking soda. Carefully pour hot syrup mixture over puff corn in pan; stir until well coated.

5. Bake, stirring every 15 minutes, 1 hour or until caramel corn is crisp. Immediately place caramel corn onto waxed paper. Cool completely. Break into bite-sized pieces. Store in tightly covered container.