Combine popcorn and pecans in a lightly greased jellyroll pan; mix well and set aside. Melt butter over low heat in a medium saucepan. Add brown sugar, corn syrup, and salt; bring to boil, and boil 5 minutes without stirring. Remove from heat, stir in baking soda and vanilla. Pour syrup over popcorn mixture stirring until popcorn is evenly coated. Bake at 300 degrees for 30 minutes, stirring after 15 minutes. Cool completely and break into small pieces.
Yield: 12 servings