Shaped Crafting Recipe

{
    "type": "minecraft:crafting_shaped",

    "pattern":
    [
        "RRR",
        "RRR",
        "RRR"
    ],

    "key":
    {
        "R":
        {
            "item": "modid:object"
        }
    },

    "result":
    {
        "item": "modid:object",
        "count": 1
    }
}