Cauldron Expansion

Name: Cauldron Expansion
Author: CodingLegend0100

Cauldron Expansion extends the vanilla cauldron, letting players hold potions, dye water and turn lava into obsidian in a cauldron.

FabricForgeNeoForgeQuiltServer required, client optionalCreative Commons Attribution Non Commercial Share Alike 4.01.21 – 1.21.1

What it does

Cauldrons gain new behaviors. Filling an empty cauldron with a potion stores that potion inside it, and several potions combined in one cauldron shorten the effect durations. Adding water or lava to a cauldron can create obsidian, so the block works as a small crafting station for that material.

Dye added to a water cauldron colors the water, and a dyed cauldron can then color leather armor, horse armor and wolf armor. Vanilla cauldron interactions keep working as before, and the author says more custom interactions are planned for later builds.

The mod is server required and client optional: the server must run it, while players may add it to their own game. Files are published for Fabric, Forge, NeoForge and Quilt, and a Data pack version is also available. Builds cover 1.21 and 1.21.1, with 1.0.1 for 1.21.1 as the latest file. It is released under the Creative Commons Attribution Non Commercial Share Alike 4.0 license and is not open source.

Key features

Potion storage
An empty cauldron filled from a potion bottle keeps the potion inside, ready for later use.
Obsidian from lava
Adding water or lava to a cauldron produces obsidian, extending the block beyond its vanilla role.
Dyed water and armor
Dye turns cauldron water a chosen color, which can then dye leather armor, horse armor and wolf armor.
Combined potion effects
Multiple potions mixed in one cauldron reduce the duration of their effects, changing how brewing is used.

Gallery

Compatibility

Latest build for each game version and loader.

Version

1.21.11.0.1+mod1.0.1+mod1.0.1+mod1.0.1+mod

1.211.0.1+mod1.0.1+mod1.0.1+mod1.0.1+mod

ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Use cases

Who it’s for: Server owners who want cauldrons to do more, and players who use leather armor, wolf armor or potions in their survival worlds. Because only the server must run the mod, players can join without installing it.

How it compares

Full comparison

Better Cauldrons is a Fabric mod for 1.21.11, open source under the MIT License and run on both the client and server. Advanced Cauldron is also Fabric-only and open source under the MIT License, published for 1.20.1 – 1.21.1 with client and server running it. Bedrock Cauldrons is server-side only, open source under the GNU Lesser General Public License v3.0 only, and covers 1.21.6 – 26.3, so it targets a different version range than Cauldron Expansion.

Mod	Loaders	Game versions	Environment	Updated
Cauldron Expansion	Fabric, Forge, NeoForge and Quilt	1.21 – 1.21.1	Server required, client optional	2024-08-28
Better Cauldrons	Fabric	1.21.11	Client and server	2025-12-21
Advanced Cauldron	Fabric	1.20.1 – 1.21.1	Client and server	2026-04-12
Bedrock Cauldrons	Fabric	1.21.6 – 26.3	Server-side only	2026-10-14

Questions

Does Cauldron Expansion need to be installed on the client?

No. Only the server must run the mod, so it works on the server alone and players can skip installing it.

Which loaders can run Cauldron Expansion?

Files are published for Fabric, Forge, NeoForge and Quilt, all for 1.21.1. A Data pack version is also available.

Are the custom cauldron interactions finished?

Not yet. The author notes more custom interactions are coming soon, so the current set covers potions, dye and obsidian.

In the catalog

Cauldron Expansion is one of 7,216 Magic mods on ModsFinder, and one of 3,630 Magic mods for Fabric. 32,366 mods support Minecraft 1.21.1.