MineAssets/1.12.2/assets/minecraft/recipes/nether_brick.json

{
  "type": "crafting_shaped",
  "pattern": [
    "NN",
    "NN"
  ],
  "key": {
    "N": {
      "item": "minecraft:netherbrick"
    }
  },
  "result": {
    "item": "minecraft:nether_brick"
  }
}