Calpis

Ingredients

• 1 pint (1 pound) plain yogurt (450grams, about 2 cups)
• 2 + 1/2 cups sugar (500grams)
• 1 1/2 teaspoon citric acid powder (or 9 tablespoons of lemon juice. Result is much better with citric acid powder. If using lemons, you will need a lot of lemon juice to get strong acidity.
• 1 teaspoon vanilla extract

1. Mix in a medium size pot:
   1 pint plain yogurt
   2 + 1/2 cups sugar
    
2. Heat it in the double boiler constantly stirring for about 15 min. at about 160°F to 175°F.Never let it boil.
    
3. When the syrup is at room temperature, add:
   1 1/2 teaspoon citric acid powder
   1 teaspoon vanilla extract
    
4. For serving dilute the syrup with 3 or 4 times of water or soda to your taste. Serve with ice and a slice of lemon.