S04/Imperial House Strain peanut butter smell

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Well-Known Member
Jan 29, 2014
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I have used s04 recently in a stout. Its been bottled for 5 weeks and it smells like peanut butter. Not sure if it was the yeast or what?

I made a yeast starter last night with the Imperial Yeast House strain. It is supposed to be the liquid form of s04. That’s what I was told. Anyways, it smelled just like my stout. I sniffed the plastic bag after pitching. Peanut butter.

I have never smelled this before. Just with this s04 and Imperial House yeast. Is this normal? Anyone else smell that?