If you need to know how to make a weakness potion, skip the nonsense: you need a brewing stand, a water bottle, and a fermented spider eye. That creates the normal Potion of Weakness. Add gunpowder afterward and it becomes a Splash Potion, which is the version you need for curing a zombie villager. The recipe is short. Getting the ingredients without wandering around for an hour is the part worth planning.
How to make a weakness potion: the exact recipe
Start by placing a brewing stand and loading it with blaze powder. The brewing stand will not operate without fuel, so bring at least one blaze rod from a Nether fortress and turn it into blaze powder. Put up to three water bottles in the bottom slots. Fill glass bottles from a water source, then place them into the stand.
The key ingredient is a fermented spider eye. Craft one with a spider eye, sugar, and a brown mushroom. Spider eyes come from spiders, sugar comes from sugar cane, and brown mushrooms appear in dark areas, swamps, the Nether, and several cave environments. You do not need a Nether trip for the potion itself unless you still need blaze powder for the brewing stand.
Place the fermented spider eye in the top ingredient slot. After the brewing arrow finishes, the water bottles become Potions of Weakness. Unlike many Minecraft potions, this recipe does not require Nether wart. That is why the weakness recipe is useful early, especially when you are preparing a zombie villager cure before you have built a full potion supply room.
A Potion of Weakness reduces melee attack damage when used on a target. It is not a general-purpose combat buff, and drinking it before fighting a zombie is usually a spectacularly bad idea. The real value is in converting it into a throwable item and using it during villager curing.
Turning it into a splash potion
To understand how to make a weakness potion for a zombie villager, you need one extra ingredient: gunpowder. Put the finished Potion of Weakness back into the brewing stand, then place gunpowder in the top slot. The result is a Splash Potion of Weakness. This can be thrown and affects nearby mobs or players in a small area.
Gunpowder drops from creepers, ghasts, and witches. Creepers are usually the practical source in the Overworld, but do not fight them beside your storage room unless you enjoy rebuilding walls. A shield, a bow, or a two-block-high safety pillar makes farming gunpowder much less annoying. Brewing stands can process up to three bottles at once, so prepare three weakness potions before adding gunpowder. One gunpowder operation can then upgrade all three.
The splash version is essential because zombie villagers need to be hit with weakness before you use a golden apple. You cannot reliably make the curing process work by standing beside the mob and drinking the potion yourself. Throw the splash potion so the zombie villager is inside the cloud, then confirm the weakness effect appears before using the apple.
Curing a zombie villager efficiently
The most useful reason to learn how to make a weakness potion is villager conversion. First, secure the zombie villager in a small enclosure. Use a roof or solid blocks to protect it from sunlight, and remove nearby hazards such as other zombies, cliffs, and open water. If the zombie villager is holding equipment, that can make the situation harder, so bring armor and a shield.
Next, throw the Splash Potion of Weakness at the zombie villager. Watch for the effect particles or status icon. Once weakness is active, use a regular golden apple on the zombie villager. The mob should begin shaking and producing conversion particles. At that point, place it somewhere safe and wait. The conversion takes several minutes, and beds, iron bars, and a secure room can help reduce the wait time, but none of them replaces the required potion and apple.
Keep the curing room separated from your trading hall. The zombie villager can still be attacked during conversion, and a stray mob can ruin the entire setup. A simple stone box with a roof, a door, and a torch-free protected interior is enough. Light the surrounding area instead of exposing the curing target to daylight.
Materials and preparation checklist
Before brewing, collect three glass bottles, one water source, one fermented spider eye, blaze powder, and a brewing stand. For a throwable version, add gunpowder. For curing, also bring a golden apple. The golden apple is consumed during the process, so do not arrive with only the potion and assume the expensive part can be found afterward.
A compact preparation route looks like this. Kill spiders until you have a spider eye, harvest sugar cane near water, and locate a brown mushroom in a dark environment. Combine those three items into the fermented spider eye. If you already have a brewing stand, skip the fortress trip; otherwise, visit the Nether, find blaze rods, and craft blaze powder. Brew three bottles together, then upgrade them with one gunpowder charge.
This setup gives you spare attempts. That matters because throwing a potion at the ground, missing a moving zombie villager, or letting the target burn is easy when you are working in a cramped village. One spare splash potion costs less time than repeating a Nether expedition.
Common mistakes that waste the run
The first mistake is using a regular Potion of Weakness when you need to affect a zombie villager. The second is throwing the splash potion before the target is enclosed. The zombie villager can wander behind a wall, fall into a hole, or get killed while you are searching for it. Secure the target first, then brew or carry the potion to the enclosure.
Another mistake is using a normal apple instead of a golden apple. The cure requires the golden version. You also need to apply weakness before the apple. If the status effect disappears, throw another splash potion before trying again.
Finally, do not confuse fermented spider eyes with regular spider eyes. A regular spider eye is only one ingredient. The fermented version requires sugar and a brown mushroom as well. That distinction is responsible for a lot of empty brewing stands and irritated trips back to the forest.
The short answer
How to make a weakness potion comes down to one direct recipe: brew a water bottle with a fermented spider eye. To make it useful for curing a zombie villager, brew that result again with gunpowder to create a Splash Potion of Weakness. Prepare three bottles, secure the villager, throw the splash potion, and use a golden apple while weakness is active.
That is the whole route. No Nether wart, no redstone, and no complicated potion chain. Gather the ingredients first, protect the target, and keep one spare bottle ready. Minecraft already supplies enough ways to lose progress without donating your cure to a creeper.
