Amafil  Sour Manioc Starch
 
polvilho doce, or sweet manioc starch, is made from fresh juice; polvilho azedo, or sour manioc starch, is the byproduct of fermented manioc juice. Both are crucial ingredients to making the culture's famous cheese bread. 
(Don't confuse it with manioc flour, a more coarsely ground version.)
Manioc starch can also be used as a thickening agent in gravies or sauces, a gluten-free replacement in baked goods, and in desserts such as banana poe