NaturesAura/src/main/resources/data/naturesaura/recipes/gold_powder.json

{
    "type": "minecraft:crafting_shaped",
    "pattern": [
        "L"
    ],
    "key": {
        "L": {
            "item": "naturesaura:gold_leaf"
        }
    },
    "result": {
        "item": "naturesaura:gold_powder",
        "count": 2
    }
}