I have a custom recipe type that has successfully registered into minecraft, however I am trying to get it to work on the standard crafting table as it doesn't need a custom table for it.

 

{
  "type": "randomfhings:potion_edible",
  "ingredients": [
    {
      "item" : "minecraft:glass",
      "data": ""
    },
    {
      "item" : "minecraft:diamond"
    }
  ],
  "output": {
    "item": "randomfhings:ruby",
    "count": 3
  }
}

This is a test recipe so far .

package org.multicoder.randomfhings.recipe;

import com.google.gson.JsonArray;
import com.google.gson.JsonObject;
import net.minecraft.core.NonNullList;
import net.minecraft.network.FriendlyByteBuf;
import net.minecraft.resources.ResourceLocation;
import net.minecraft.util.GsonHelper;
import net.minecraft.world.inventory.CraftingContainer;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.item.crafting.*;
import net.minecraft.world.level.Level;
import org.multicoder.randomfhings.RandomFhings;

import javax.annotation.Nullable;

public class PotionRecipe implements Recipe<CraftingContainer>
{
    private final ResourceLocation id;
    private final ItemStack output;
    private final NonNullList<Ingredient> input;

    public PotionRecipe(ResourceLocation id, ItemStack output, NonNullList<Ingredient> input) {
        this.id = id;
        this.output = output;
        this.input = input;
    }

    @Override
    public NonNullList<Ingredient> getIngredients()
    {
        return input;
    }

    @Override
    public boolean matches(CraftingContainer p_44002_, Level p_44003_)
    {
        return input.get(0).test(p_44002_.getItem(0));
    }

    @Override
    public ItemStack assemble(CraftingContainer p_44001_) {
        return output.copy();
    }

    @Override
    public boolean canCraftInDimensions(int p_43999_, int p_44000_) {
        return true;
    }

    @Override
    public ItemStack getResultItem() {
        return output;
    }

    @Override
    public ResourceLocation getId() {
        return id;
    }

    @Override
    public RecipeSerializer<?> getSerializer()
    {
        return Serializer.INSTANCE;
    }

    @Override
    public RecipeType<?> getType()
    {
        return Type.INSTANCE;
    }

    public static class Type implements RecipeType<PotionRecipe> {
        private Type() { }
        public static final Type INSTANCE = new Type();
        public static final String ID = "potion_edible";
    }

    public static class Serializer implements RecipeSerializer<PotionRecipe> {
        public static final Serializer INSTANCE = new Serializer();
        public static final ResourceLocation ID =
                new ResourceLocation(RandomFhings.MOD_ID,"potion_edible");

        @Override
        public PotionRecipe fromJson(ResourceLocation id, JsonObject json) {
            ItemStack output = ShapedRecipe.itemStackFromJson(GsonHelper.getAsJsonObject(json, "output"));

            JsonArray ingredients = GsonHelper.getAsJsonArray(json, "ingredients");
            NonNullList<Ingredient> inputs = NonNullList.withSize(2, Ingredient.EMPTY);

            for (int i = 0; i < inputs.size(); i++) {
                inputs.set(i, Ingredient.fromJson(ingredients.get(i)));
            }

            return new PotionRecipe(id, output, inputs);
        }

        @Override
        public PotionRecipe fromNetwork(ResourceLocation id, FriendlyByteBuf buf) {
            NonNullList<Ingredient> inputs = NonNullList.withSize(buf.readInt(), Ingredient.EMPTY);

            for (int i = 0; i < inputs.size(); i++) {
                inputs.set(i, Ingredient.fromNetwork(buf));
            }

            ItemStack output = buf.readItem();
            return new PotionRecipe(id, output, inputs);
        }

        @Override
        public void toNetwork(FriendlyByteBuf buf, PotionRecipe recipe) {
            buf.writeInt(recipe.getIngredients().size());
            for (Ingredient ing : recipe.getIngredients()) {
                ing.toNetwork(buf);
            }
            buf.writeItemStack(recipe.getResultItem(), false);
        }

        @Override
        public RecipeSerializer<?> setRegistryName(ResourceLocation name) {
            return INSTANCE;
        }

        @Nullable
        @Override
        public ResourceLocation getRegistryName() {
            return ID;
        }

        @Override
        public Class<RecipeSerializer<?>> getRegistryType() {
            return Serializer.castClass(RecipeSerializer.class);
        }

        @SuppressWarnings("unchecked") // Need this wrapper, because generics
        private static <G> Class<G> castClass(Class<?> cls) {
            return (Class<G>)cls;
        }
    }
}

This is my recipe type class and it is registered via a deferred register.

Edited October 4, 20223 yr by MultiCoder
Quick edit for ID

Use the same recipe type as the crafting table. The recipe and serializer is the only thing that needs to be unique.

Could you explain what you mean by that, just to clarify I am trying to create a recipe type that handles potions and I'm pretty sure the standard recipe type cannot handle nbt data within the recipe.

Do you mean use minecraft:crafting_shapeless as the type in the json file or am I misinterpreting 

Edited October 4, 20223 yr by MultiCoder
Appended

Your Recipe needs to

extends CraftingRecipe

look at RecipeType.CRAFTING used by CraftingMenu.