[header] How to cook sinigang na baboy [title] Choose the souring agent. [step] Tamarind is the most traditional souring agent used for. You can prepare the soup with fresh tamarind or use a powdered tamarind-flavored sinigang mix. 
[substeps] When using fresh tamarind, you'll need 10 to 15 standard pieces of fruit. When using powdered flavoring, you'll need 1-1/2 packages, each weighing 1.41 oz (40 g).