ButterFine is a Butterium variant with a curated mod set made to match the features of OptiFine.

Butterium is a feature-packed and user-friendly way to experience Minecraft without performance issues or a billion ugly configuration screens. Our fine selection of performance mods and configurations allows for your game to run smooth like butter on even the weakest hardware and devices. It's designed so that anyone— no matter if they're new to the game or already a pro PvP player— can enjoy the game smoothly, without interruptions with all the features and mods they like

We at BUTR Studios achieve lots of this by integrating each mod into our very own custom-made ButterUI. So, to put it simply, we achieve UX perfection with performance, quality of life and gameplay all in one pack with ~42 mods.

Please view the gallery to see more UI, HUD and features

↳ Mid-resolution gif of ButterUI customizations minimized to a small window

⚡ Lightning fast performance - Despite its large feature set, Butterium has comparable and sometimes better performance than the top performance packs and clients without being a bloated RAM hog (especially in multiplayer)

🎮 Cool Gameplay/Multiplayer Features - We have integrated mods for freecam, fullbright, version-switching/spoofing, account switching, resource/shader pack browsing, voice chat and more to ensure that you have more than just smooth frame rates and nice GUI's

⚙️ Custom Settings and GUI's - We use FancyMenu to fine-tune our GUIs and integrate mods using our own ButterUI design language, integrated mods feature redesigned config screens accessible from Butterium menus and settings

🎮 Custom HUD - We integrate features like keystrokes, time, armor display, co-ordinates and more into Butterium's HUD, you can drag everything around with ease

📆 Regular Updates - BUTR Studios is dedicated to meeting user needs by adding new features, bug squashing and improving UX with every update

ButterUI is an OreUI-inspired design language featuring user-friendly, abstract-looking menus and insane customisation - you can simply change the accent color and background from our nice personalisation menu

↳ Or you could even enter FancyMenu (please read the documentation) and customise EVERYTHING- Not easy but still super cool for advanced users

We provide ButterUI support for a whole bunch of mods- all included mods should be supported and a range of popular mods you can add yourself are supported to be consistent with ButterUI design. A list will be released soon on GitHub

The ButterUI experience is created using our own resources and FancyMenu configuration. I (caela.uk) work with FancyMenu a lot and have been for approximately 2 years now. I commonly push FancyMenu's limits and have to request tons of features, most of which Keksuccino kindly adds for me (and others) to make ButterUI better with

We refer to Butterium as a Client-like modpack. Lets explain why:

1. Many of our users have switched from using popular clients to using Butterium

2. Us devs make this pack feel as custom made for you as possible (e.g draggable windows, onboarding)

3. We're working to make this pack integrate each mod to perfection, from custom menus, keybinds and commands, to completely custom mods themselves (coming soon)

4. We are actively working on a client-like yet minimal launcher with the ability download and install the modpack from Modrinth automatically for those users who might be new to modpacks or transitioning from a popular client or vanilla

• Add a "support us" widget

• ButterHost integration and features

↳ Like controlling the server and starting a free trial from in game (referral systems too), hook in with the social features

• Installer, launcher and minimal mobile app

↳ https://github.com/BUTR-Studios/BUTR-Launcher

• Launcher Crash Assistant

↳ With Discord link and "copy logs" button

• Redesign HUD editor w/ support for resizable HUD widgets

↳ With sliders and submenus

• Optional translucent HUD widget backgrounds

• Set up Discord Status to include download button

• For cool events servers, show live events on a main menu widget

• Move assets to resources

↳ Also allow resource pack to edit configs and stuff with txts like overrides (prompt first)

Rework all icons as pixel-perfect images (maybe with seperate folder for included shadows)

Move all text to localization keys

• Spec detection and optimization

↳ BUTR-Studios/spec-engine

Hardware scoring system, then finds optimal configs and modset for your hardware specifications

• Screenshot previews and viewer

Most, if not all of our GUI's were created using the amazing tool that is FancyMenu by Keksuccino, this is amazing for creators as it allows for custom designs and scripting within Minecraft, faster and better than any custom mod we could ever create ourselves

Butterium has been a passion project of many names over the past 2 years and we wouldn't be here if not for our amazing community and supporters from the Minecraft modding scene

We protect our work here with the Smooth Like BUTR Licence

Smooth Like BUTR Licence (SLBLv2)

Copyright © 2026 BUTR Studios and Caela Muñiz-Nelson

1. Creative Works, Assets & Design

All custom assets and creative works, including but not limited to:

• Custom Images, Animations, Logos or Branding

• Any code or scripts we create (Python, Bash, Batch, FancyMenu Actions, etc.)

• FancyMenu Layouts (.txt files from config/fancymenu/customization/ and anything in the config/fancymenu/assets/ folder)

• Our own built-in resources or resource packs (mainly located in resources/)

Are strictly proprietary. You may NOT redistribute or incorporate these into other software/modpacks without explicit written permission from the following email: legal@butr.uk

2. Simple Configurations

Permission is hereby granted free of charge to any person obtaining a copy of simple configuration files (mainly located in folders like config/) to:

• Modify and adapt the settings for personal or server use

• Share specific or few configurations and tweaks with the community and others

Please note: This strictly does NOT include the right to redistribute the entire config/ folder as a standalone "copycat" pack since that would also contain our ceative works like assets and FancyMenu layouts.

3. General Terms

Our creative works or software (such as Modpacks or services) as a whole are provided "AS IS". This licence does not cover the individual dependencies, mods or shaders contained within software, which are subject to their own respective creators' licenses.

We do not care whether your PC grew legs and walked away or simply crashed to desktop; we provide no warranties. However, we do acknowledge our obligations stated under the UK Consumer Rights Act 2015. Therefore, we may be liable for damage to your device or personal data if such damage is a direct result of our failure to use reasonable care and skill when crafting our software or creative works. Beyond these legal requirements, you use our creative works and software entirely at your own risk; though our staff and community will try to provide support wherever possible.

By continuing to use BUTR Studios software and creative works, you generally agree to the most recent version of the Smooth Like BUTR Licence found on the Licence's GitHub file. We cannot hold you liable for newly added or edited rules that may change your rights or obligations unless you have been given a and have continued to use or redistribute our software/creative works. Previous versions of the Smooth Like BUTR Licence will remain via the folder on the Licence's GitHub purely for .

If you encounter any incompatibilities, missing features or bugs whilst using this modpack please report them to the BUTR Studios official Discord linked below ↓