Applied-Energistics-2/src/main/resources/data/appliedenergistics2/recipes/grinder/flour.json

{
  "type": "appliedenergistics2:grinder",
  "input": {
    "tag": "forge:crops/wheat"
  },
  "result": {
    "primary": {
      "item": "appliedenergistics2:flour"
    }
  },
  "turns": 4
}