Pumpkin/assets/datapack/data/minecraft/recipe/chiseled_sulfur.json

{
  "type": "minecraft:crafting_shaped",
  "category": "building",
  "key": {
    "#": "minecraft:sulfur_slab"
  },
  "pattern": [
    "#",
    "#"
  ],
  "result": {
    "id": "minecraft:chiseled_sulfur"
  }
}