Where banana and clove in a wheat beer come from

July 1, 2025

It is the yeast, not the wheat

First time somebody brews a wheat beer and gets that big banana aroma off it, the natural assumption is that it came out of the tin, and it didn't. Wheat malt brings a softer body and a hazier look and not much flavour of its own, so the banana and the clove you're smelling are both made by the yeast while it ferments, which is genuinely good news because it means you can steer them.

The two compounds worth knowing about

The banana is an ester, and yeast makes more of it when it's working warm and when it's under a bit of stress. The clove and pepper character is a phenol, and only certain yeast strains produce it at all, so you can't get a wheat beer character out of a standard ale yeast no matter what malt you use.

So the strain decides whether you get clove, and the conditions decide how much banana rides alongside it. Those are two different levers and it helps to keep them separate in your head.

How to push it one way or the other

Ferment at the warm end of the range on the packet and you'll get more banana. Ferment at the cooler end and the clove steps forward while the banana pulls back. That's the single biggest control you have and it costs nothing.

Pitching rate matters too. An underpitched ferment stresses the yeast and pushes the esters up, which some people do deliberately and others do by accident and then wonder why one batch smelt like a fruit shop.

Give it headspace as well, because a fermenter filled to the brim raises the pressure a little and knocks the esters back, and that's rarely what you want in this style.

If it came out tasting of neither

A wheat beer that's flat and characterless usually means the ferment ran too cold for the strain, or the yeast was old and struggling. Check the temperature you actually held rather than the one you meant to hold, because the difference between those two numbers explains most disappointing batches.

And bottle conditioning does real work in this style, so give it the full 3 weeks before you judge it. A young wheat beer tastes thin and then fills out.

For the step by step on brewing one, have a read of Thomas Coopers Preacher's Hefe Wheat, how to brew it.

Shop related products

Coopers Brew Enhancer 2 1kg. Adds body without burying the yeast character.
Coopers Light Dry Malt 500g. Malt backbone, kept pale.
Coopers Dextrose 1kg. If you want it drier and lighter.
Coopers Brew Enhancer 1 1kg. The lightest of the blends.

Have a look through our Coopers collection for the rest.

Did you know we stock the Coopers hefe wheat kit in the shop, along with heat belts and hydrometers that aren't on the website. Give us a ring on (08) 8536 4333 to check what is on the shelf.

Brewhilder will help you pick a yeast, or come in and chat with us.