source: Hostess with the Mostess
The blood rim is made from the same kind of mixture as you use to make hard candy. It’s actually pretty easy, but you will need a candy thermometer (which you can find at most grocery stores).
1 c. Sugar
1/2 c. Karo Syrup
1/2 c. Water
Red Food Coloring
Combine sugar, syrup and water. Cook without stirring to hard crack stage – which is 300 degrees F. Add food coloring. (Optional: Cinnamon may be added for flavor.)
Turn off heat. While the mixture is still hot, dunk the top of the cocktail glass into the mixture to create the red rim. If you need to do several glasses, keep the mixture hot so it lasts longer (instead of turning heat off, just reduce slightly).You can go anywhere from just along the very tip of the rim to part way down the glass – whichever you prefer. Flip the glass right side up to cool. The thick consistency of the mixture will cause “drips” as it hardens on the glass!You can serve red champagne for the toast. There are few choices for red sparkling wine. The are few available, but lucky you Central Market carries a popular Australian wine: Black Chook. It averages around $15 per bottle. Some domestic choices: Schug Rouge de Noirs (around $24), a pinot noir from the Carneros region of Napa.
And of course, for the vampire guests, a must have is True Blood. O positive is widely popular, but I highly recommend having other blood types available, less the vamps turn to humans for their refreshments. Make sure the caterer has a microwave on site, vampires like their True Blood warm, like real human blood.