"Our maple syrup is produced from a single source, meaning that all the sap comes exclusively from trees on our farm. We do not buy maple sap or syrup from any other producers."
Heat oven to 250 degrees F. Cook popcorn according to package directions. Put popped corn in a slightly buttered bowl. In a saucepan, melt butter, add maple syrup, brown sugar and salt. Boil without stirring for 5 minutes careful not to boil over. Remove from heat. Stir in baking soda and vanilla. Pour gradually over popped corn in a large roasting pan and mix well. Bake 1 hour stirring every 15 minutes. Remove from oven and cool.