I decided to try and make muffins that look like muffins so I came up with the method below.
The mixing is all the same as above, but then spoon it into silicone muffin cups.
Put them on aluminium racks made from flashing and lower into the Jetboil and hook over the top.
The lid fits over the aluminium ok.
When done this way it also uses a little less fuel as it only takes 15 Mins to cook.
The muffins taste as good as if they were made in the oven, probably a little moister due to the water vapour used for the cooking.
The muffins shown in the photo rose a little more than expected, that's why they are a little mashed on top, but otherwise as good as an oven.
There is definately no plastic taste with this method.
The whole contraption only weighs 30g, which includes the silicone cups.