Pop microwave popcorn according to package instructions and spread out onto large parchment lined cookie sheets.
In a small saucepan, melt butter, sugar, and corn syrup and bring to a rolling boil and heat for 2-3 minutes.
Remove from heat, add red food coloring and vanilla extract and stir well.
Using a spoon, quickly drizzle the bloody caramel over the popcorn and toss gently to coat.
Serve in popcorn themed boxes and splatter with additional bloody caramel sauce to taste. Note: Caramel will begin to thicken when cooled. To soften, reheat over low heat, stirring occasionally until desired consistency is reached.
