Minecraft Wiki: Adding a Smelting Recipe

package net.minecraft.src;

public class mod_myMod extends BaseMod
{
    public void addRecipes()
    {
        ModLoader.addRecipe(new ItemStack(Item.diamond, 2), new Object[] { "DDD", "DDD", "DDD", 'D', Block.cobblestone});
        ModLoader.addSmelting(Block.dirt.blockID, new ItemStack(Item.dyePowder, 32, 4));
    }

    public void load()
    {
        this.addRecipes();
    }

    public String getVersion()
    {
        return "Version 1.0";
    }
}