Soap is made by putting 3 Polymer (or Oraginc Polymer) and 2 Oil into the cooking pot with water. Then just light up the cooking pot and you'll get your soap. At this time there may be a recipe card coming for Soap, but at the moment the only way to find this recipe is by looking it up on the web.
Submerge In Water (Waterskin, Water Jar, or Canteen at least 25% full)
Cook In Cooking Pot