[header] How to make soy sauce [title] Wash and sort 4 cups (950 ml) of soybeans. [step] You can get soybeans (or edamame) from some grocery stores, although you may need to visit a store specializing in asian produce. [substeps] Make sure you remove the soybeans from their pods before you soak them. 
If your market makes a distinction between soybeans (mature beans) and edamame (young, softer beans), use the soybeans. To wash the soybeans, place them in a colander and rinse them under cold water.