Baking – Why did the oatmeal and raisin cookies end up tasting soapy

bakingcookiesmistakesoats

I've made oatmeal cookies twice, and both times they have ended up tasting "soapy" and a touch bitter – the first time really strongly, the second less so, but still badly enough that I have to throw them away.

The details of the first attempt are lost to time, but the second time I used this recipe. I think I followed it pretty accurately.

The only theories I have right now are:

  • The bicarbonate of soda has a naturally soapy flavour (does it?), and I didn't fully finish cooking the cookies (I like them quite chewy – they definitely had a tan on top but probably could have had at least another 2-3 minutes in the oven before burning I suspect). But I baked them for around 15 minutes, more than the recipe anyway.

  • The oats were a little old (the packet was probably about two months old), and maybe they'd gone bad? But they looked fine, and when I cooked some not that long ago for breakfast, they seemed fine.

Do either of these seem plausible, or is there another possible explanation?

Best Answer

I don't see anything acidic enough to react with the baking soda and neutralise it. That's often the culprit in a soapy flavour. Flour and egg are very slightly acidic but I don't think it's enough, especially if the eggs are old. Brown sugar is more acidic than white. I would assume golden caster is somewhere in between, but if you used ordinary caster (I would, I don't keep in golden caster nor is it in my closest supermarket) that would lose some acidity. Brown sugar is common in similar recipes.

Any residual alkalinity from the baking soda may be more noticeable if you omit the salt that isn't listed on the ingredients, only in the method.

Replacing the baking soda with baking powder would be an option here, but only because so little is used.

But looking at the comments, many people found them oily (though I have no way of checking whether they tasted them too soon). Perhaps look for a different recipe, though I tend to find the BBC recipes generally OK, and they've actually been tested in grams unlike some rather suspect conversions.