To get a fermented spider eye in Minecraft, you need to craft it from three simple ingredients: a spider eye, sugar, and a brown mushroom.

How to Get a Fermented Spider Eye

Quick Scoop

A fermented spider eye is a crafting ingredient used mainly for brewing “negative” and utility potions like Weakness, Harming, Slowness, and Invisibility. You can’t find it naturally; you always have to craft it.

Step 1: Gather the Ingredients

You need three items:

  • Spider Eye
    • Dropped by spiders and cave spiders when killed.
  • Brown Mushroom
    • Found in dark/shaded areas, forests, swamps, and the Nether.
  • Sugar
    • Crafted from sugar cane (place sugar cane in the crafting grid to get sugar).

Each recipe uses exactly:

  • 1 spider eye
  • 1 brown mushroom
  • 1 sugar

Step 2: Crafting the Fermented Spider Eye

You must use a crafting table (3×3 grid).

  1. Place the crafting table and open it.
  2. Put the items into any slots of the 3×3 grid:
    • 1 spider eye
    • 1 brown mushroom
    • 1 sugar
  1. Take the fermented spider eye from the result slot into your inventory.

In some tutorials, they show a specific layout (mushroom top, sugar middle, spider eye bottom), but the recipe is shapeless: any arrangement works in the 3×3 grid.

Step 3: What You Can Do With It

Once you have fermented spider eyes, you mainly use them in brewing.

Typical potions it helps create (by modifying existing potions in a brewing stand) include:

  • Potion of Weakness
  • Potion of Harming
  • Potion of Slowness
  • Potion of Invisibility (e.g., from a Night Vision base potion)

You’ll need:

  • A brewing stand (crafted from 1 blaze rod + 3 stone, or found in villages).
  • Water bottles, Nether Wart, and other ingredients as bases.

Mini Forum-Style Tip Roundup

“Just remember it’s shapeless—throw spider eye, brown mushroom, and sugar anywhere in the 3×3 and you’re done.”

Common tips players share lately:

  • Farm sugar cane near water to have endless sugar.
  • Explore dark forests and the Nether early to stock up on brown mushrooms.
  • Make a simple spider farm near a spawner to get plenty of spider eyes for late‑game brewing.

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Information gathered from public forums or data available on the internet and portrayed here.