minecraft-assets/data/minecraft/recipe/copper_trapdoor.json

{
  "type": "minecraft:crafting_shaped",
  "category": "redstone",
  "key": {
    "#": {
      "item": "minecraft:copper_ingot"
    }
  },
  "pattern": [
    "###",
    "###"
  ],
  "result": {
    "count": 2,
    "id": "minecraft:copper_trapdoor"
  }
}