Cooking them together is fine but storing them together is not.
After a week the onions will be rotting, and then the potatoes will be too.
I one had a shallow wicker basket that I kept potatoes and onions in. I kept noticing a smell like baby shit in the cabinet, and after looking at it the rotten onion potato sludge had seeped into the weaving of the basket. Washing it several times, I was able to get most of the smell away, but I think there was still some left over. LFMF.
Keep them somewhere cool and dry, and far away from onions
Why far from onions? I been storing them together.
Onions release a gas/chemical/pheromone thing that makes taters go bad faster. Or vice versa.
apparently onions make ethylene (which ripens many things) and potatoes are just like, real wet
https://www.foodnetwork.com/how-to/packages/food-network-essentials/why-you-need-to-store-your-onions-and-potatoes-separately
Cooking them together is fine but storing them together is not.
After a week the onions will be rotting, and then the potatoes will be too.
I one had a shallow wicker basket that I kept potatoes and onions in. I kept noticing a smell like baby shit in the cabinet, and after looking at it the rotten onion potato sludge had seeped into the weaving of the basket. Washing it several times, I was able to get most of the smell away, but I think there was still some left over. LFMF.