Rockwell Recipes - Ark Survival Evolved
Soap is made by putting 3 Polymer (or Organic Polymer) and 2 Oil into the cooking pot with water. Then just light up the cooking pot and you'll get your soap. 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 or Industrial Cooker