minecraft-assets/data/minecraft/recipes/honeycomb_block.json

{
  "type": "minecraft:crafting_shaped",
  "pattern": [
    "HH",
    "HH"
  ],
  "key": {
    "H": {
      "item": "minecraft:honeycomb"
    }
  },
  "result": {
    "item": "minecraft:honeycomb_block"
  }
}