Camping stove to supplement an electric hob

Camping stoves are generally not safe for indoor use. They can produce fumes or carbon monoxide that would be fine outdoors, but dangerous indoors. Check the warning labels before buying anything to use inside.

As for the actual cooking, I don't think that you'll get the results that you expect.

My experience includes an MSR Whisperlite International backpacking stove (white gas), and Coleman two-burner stoves in both white gas and propane variants. Anecdotally, the backpacking stove has limited control, while the two-burner stoves don't quite have the oomph of a real gas stove.

The Coleman links that I provided indicate that the white gas stove has burners that put out 7,500 and 6,500 BTU, while the propane stove puts out 10,000 btu on both burners. Using the REI-provided time for boiling water, I calculated that the backpacking stove puts out about 4,500 BTU (and other backpacking stoves indicate similar times, regardless of fuel).

By comparison, my consumer-grade natural gas-powered kitchen stove has two burners that put out 15,500 BTU, one that puts out 9,500, and one (the simmer burner) that puts out 5,000. Viking offers normal burners up to 18,000 BTU, and a wok burner of 27,000.

However, white gas stoves aren't okay indoors. They're fine while they're burning, but lighting them is a bit dramatic, and once you shut them off they'll put out half-burned fumes for several minutes.

Similarly, propane camping stoves usually put off too much carbon monoxide to be safe indoors.

Although I've seen stoves where you'd hook up what looked to be a propane cylinder, I don't know what hydrocarbon they were using. And as it was a built-in, it would've had the appropriate venting as required by code.

If you're using a camping stove, you're going to run the risk of carbon monoxide build-up, particularly if you're using it when it's cold out, and you've got the windows closed.

There are butane burners that are supposed to be suitable for indoor use, but I'm personally not sure I'd trust them; they all risk carbon monoxide if there's not enough oxygen for combustion.

So, to answer the question -- yes, it'll work, yes, there are even ones intended for this purpose ... but what I'd look for? A carbon monoxide detector to install before you use it. And as mentioned -- BTUs ... and remember, even though they're small, propane stores more energy than natural gas, so you can get some rather large burners. (eg, the ones sold to fry turkeys)

Yes, actually portable butane stove do a very good job and can be bought for under 30$ at most sports/camping stores.