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

{
  "type": "minecraft:stonecutting",
  "count": 1,
  "ingredient": {
    "item": "minecraft:polished_blackstone_bricks"
  },
  "result": "minecraft:polished_blackstone_brick_stairs"
}