minecraft-assets/data/minecraft/recipes/toxic_resin.json

{
  "type": "minecraft:smelting",
  "category": "misc",
  "cookingtime": 300,
  "experience": 0.1,
  "ingredient": {
    "item": "minecraft:poisonous_potato_oil"
  },
  "result": {
    "id": "minecraft:toxic_resin"
  }
}