# Quick start

Override an existing shredder recipe and verify the result.

This example overrides the existing apple shredder recipe so that one apple produces **two sugar**.

## 1. Create the pack

Create this folder structure:

```text
apple-yield/
  pack.mcmeta
  data/
    hbm/
      recipe/
        shredder/
          shredder.apple.json
```

Put this in `pack.mcmeta`:

```json
{
  "pack": {
    "description": "NTM example: apples yield two sugar",
    "min_format": [
      121,
      0
    ],
    "max_format": [
      121,
      0
    ]
  }
}
```

Use **data-pack format 121.0**.

## 2. Override the recipe

Put this complete recipe in `data/hbm/recipe/shredder/shredder.apple.json`:

```json
{
  "type": "hbm:shredder",
  "input_items": [
    {
      "ingredient": "minecraft:apple"
    }
  ],
  "order": 76,
  "output_items": [
    {
      "id": "minecraft:sugar",
      "count": 2
    }
  ]
}
```

The bundled recipe produces one sugar. This example changes the output to two and retains the original input and ordering value.

The resource identifier is `hbm:shredder/shredder.apple`: namespace `hbm`, then the path relative to `recipe/`, without `.json`. Matching that identifier replaces the lower-priority file.

## 3. Install and enable it

For general pack installation, see the [Minecraft Wiki installation guide](https://minecraft.wiki/w/Tutorial:Installing_a_data_pack). The steps below use this pack's path and ID.

- **Singleplayer:** place the `apple-yield` folder inside `saves/<world>/datapacks/`.
- **Dedicated server:** place it inside the loaded world's `datapacks/` directory, usually `<level-name>/datapacks/`.
- **ZIP:** put `pack.mcmeta` and `data/` at the ZIP root.

With command permission, check the pack list:

```text
/datapack list
```

If needed, enable the folder pack at the end of the enabled list so it has higher priority than the bundled data:

```text
/datapack enable "file/apple-yield" last
```

Use the exact pack name shown by the command if yours differs. Then reload after editing the recipe:

```text
/reload
```

## 4. Check the outcome

Check the game/server log for the recipe identifier and load errors. Start a new operation in a powered shredder with an apple. The expected result is two sugar for one apple.

Use a test world while developing a pack. A recipe appearing in a recipe viewer establishes that it was indexed; running it in the machine establishes that the machine can actually use it.

Next: [Recipes](https://movblock.mov/ntm-next/26.3/wiki/recipes.md), or [Custom Machines](https://movblock.mov/ntm-next/26.3/wiki/custom-machines.md).