bedrock-samples/behavior_pack/recipes/crafting_table_copper_grate.json

{
  "format_version": "1.20.10",
  "minecraft:recipe_shaped": {
    "description": {
      "identifier": "minecraft:copper_grate"
    },
    "tags": [ "crafting_table" ],
    "pattern": [
      " # ",
      "# #",
      " # "
    ],
    "key": {
      "#": {
        "item": "minecraft:copper_block"
      }
    },
    "unlock": [
      {
        "item": "minecraft:copper_block"
      }
    ],
    "result": {
      "item": "minecraft:copper_grate",
      "count": 4
    }
  }
}