Raw papaya milk

Papita ka doodh

Papaya latex/sap measured by drop; no spoon or piece conversion.

Instead of Raw papaya milk

True raw papaya latex has no real substitute; papaya paste is the closest, but weaker.

Raw papaya paste
Use the same weight; blend fresh raw papaya. Weaker tenderising effect, so marinate a little longer.
Green papaya paste
Use the same weight; blend fresh green papaya. Similar but often weaker than latex.
Vinegar
Use about 1 tbsp per 500 g meat; acid tenderises differently and changes the flavour, so use only if the marinade suits it.