{
  "format_version": "1.21.80",
  "minecraft:recipe_furnace": {
    "description": {
      "identifier": "minecraft:furnace_copper_pickaxe"
    },
    "unlock": [
      {
        "item": "minecraft:copper_pickaxe"
      }
    ],
    "tags": [
      "furnace",
      "blast_furnace"
    ],
    "input": "minecraft:copper_pickaxe",
    "output": "minecraft:copper_nugget"
  }
}