Tell me if I found a new world record biome in the comments

I found a 1 block biome in the middle of a mountain once, it went from mountain to plains

there used to be a thing where the were 5 blocks made of sand that would spawn and it was a beach biome

it was patched though

That is just naturally spawning grass in the mooshroom biome.

there's a one-block mushroom biome in a certain seed

witch is...?

cant find the seed but I can give you the article I found on it. I originally saw it in a video by SkipTheTutorial

and the article is...?

https://screenrant.com/minecraft-smallest-mushroom-biome-caves-cliffs-update/#:~:text=One%20Minecraft%20player%20made%20a,the%20middle%20of%20the%20ocean.