Raspberry peanut butter mead, this happened after racking into tertiary. Primary and secondary had raspberries freefloating in the container, so it miiiight just be floating bits of raspberry. When I shake it up, they briefly sink and float back up.
this post was submitted on 21 Dec 2025
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Homebrewing - Beer, Mead, Wine, Cider
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Peanut butter ? Its not because you can do something that you should...
What does it smell? Nice subtle yeast odor or an odd/off odor?
It doesn't look like mold, but it could be unwanted bacteria biofilms which should smell bad...
Curiosity inspires!
It smells like honey and peanuts, nothing off
But how did you include the peanut butter ? Yeast can't digest fat and if you have a thin layer of oil on top of your mix (fat and water never mix), then bad things can happen on top of this layer.
But if it doesn't smell off then you are normaly ok.
I didn’t use actual peanut butter, it was PB2 powdered peanut butter
I see, you should be good then, but its maybe better to remove what is floating
Funny thing is, apparently, yeast can metabolize fat - according to Dr. White, they can use available fat instead of synthesizing their own using oxygen on growth stage to build new cell walls. It's not a lot of fat they need though, but quite measurable amount, and only on exponential growth.