1 c. butter
1/2 c. sugar
1 tbsp. cinnamon
1/2 tsp. salt (optional)

Pop popcorn, about 2 to 3 quarts. Put in large bowl with lid. (Largest Tupperware bowl works great.) Cook all ingredients over medium heat until sugar dissolves. Pour over popcorn. Put on lid and shake to cover popcorn evenly. Spread on cookie sheet in single layer. Bake at 300 degrees for 15 minutes.