I think pancakes are a great meal idea for hiking trips. You can buy the mix that only requires water (watch out for the ones that require oil and egg).
I'm making pancakes at home right now and I mixed up 1 cup of mix with 2/3 cup of water. I weighed 1 cup of mix at 159g (5.6oz) which makes a pretty decent amount of food. It looks like I'm going to get 6 decent sized pancakes out of this.
That might be a bit light for 2 people but it's a feast for one. You'd probably want about 3/4cup/person for a nice meal. Maybe less for a smaller person.
UPDATE: My wife and just ate the pancakes. I had 4 and she had 2, we are both full but could probably cram 1 more down each. This confirms my suspicion that 3/4 cup (120g or 4.2oz) is a good amount per adult male. Besides the mix, you'd probably want an ounce or two of maple syrup and a bit of oil to cook it with. Total meal weight is likely around 7oz.
I'm not sure how good pancakes are nutritionally, but under 1/2 lbs for a hearty meal that is cheap and easy to plan is great.
