drops green food coloring
Place popcorn in a large roasting pan; keep warm in a 250 oven.
Meanwhile in a large saucepan, combine sugars, water, corn syrup, vinegar and salt. Cook and stir over med. heat until mixture comes to a boil.
Cook, stirring occasionally, until a candy thermometer reads 250 ( hard ball stage)
Remove from heat; stir in butter 'til melted. Stir in food coloring.
Drizzle over warm popcorn and toss to coat. Cool. Break into pieces. Store in an airtight container.