diacraft/datapack/data/diacraft/recipes/kawaiidishes_ground_coffee.json

{
    "type": "create:milling",
    "ingredients": [
        {
            "item": "kawaiidishes:roast_coffee_beans"
        }
    ],
    "results": [
        {
            "item": "kawaiidishes:ground_coffee",
            "count": 1
        }
    ]
}