In his accompanying video at 12:00, he says that the dark soy sauce is similar to kecap manis, which is a sweetened soy sauce used in Malaysian and Indonesian foods. If you are not sure of the Healthy Boy items, you might look for kecap manis. I can recommend the ABC brand. Or if it helps, you can look up the ingredients in the Healthy Boy products and compare them to kecap manis -- on my bottle of ABC, the ingredients are listed as: Palm sugar, water, salt, soybean, wheat, sodium benzoate.