Combine butter, corn syrup, sugar and salt. Heat until bubbly around edges stirring occasionally. Continue to cook for 5 min over medium heat. Remove pan from heat add baking soda. Stir until foamy. (note: mixture will double in volume). Pour over popped corn and nuts. Mix well. Place on cookie sheet. Bake at 200 for 1 hour, stirring every 15 min.
