A student from the Panobo Provincial High School (Dean Cabote), as early as 1977, had proven that the stalk of the coconut leaves could yield vinegar. Just as the coconut blossoms can yield tuba because of the elements present in them, so also would the stalk, as the same nutrients are present in the same tree.
- Cut fresh stalks, slice into sizes 10 cm. wide and Â½ cm. thick, about 10 pieces.
- Boil these in 1 liter water for 10 minutes, cool until lukewarm.
- Add 10 grams white sugar (about 2 tbsp.) and 3 grams yeast (about 1 tsp.).
- Transfer them in a jar and cover with muslin cloth until fermented.
- After 2 weeks, strain and cook in a double boiler for about 10 minutes.
- The 800 grams that will remain will be as sour and as aromatic as a 6-week-old vinegar from tuba.