1 1/3 cup sugar
1 cup very hot water
1 cup corn syrup (Glucose)
1/2 tsp PLUS 1/4 tsp vanilla
10 cups cold soda water
1/8 tsp Lemonade Kool-Aid powder (unsweetened kind) Don't worry my non-US friends I'm working on a substitute recipe for this.
Dissolve the sugar and Kool-aid in the hot water.
Add the corn syrup and vanilla. Stir well.
Cover and chill syrup until cold. When the syrup is cold, pour 1/4 cup syrup into a glass and add 1 cup cold soda water. Stir gently, add ice, and serve.
Corn Syrup/Glucose in Australia costs about $5 for the size of two cups so it wasn't really economical. I found a recipe for a corn syrup substitute that I have also tried and it really WORKS.
2 c. white sugar
3/4 c. water
1/4 tsp. cream of tartar
Dash of salt
Combine all ingredients in a heavy, large pan. Stir and bring to a boil. Reduce heat to a simmer and put cover on it for 3 minutes to get sugar crystals off the sides of the pan. Uncover and cook until it reaches soft ball stage. Stir often. Cool syrup and store in a covered container at room temperature. It will keep for about 2 months. Makes almost 2 cups.
I made this recipe then before it cooled too much I poured it straight into the cream soda mix I made and it worked just fine. If I allowed it to cool much more it would have been too sticky and a lot of the mixture would stick to the sides of the saucepan. If you double the cream soda recipe then the corn syrup recipe is the perfect amount.