I made a batch tonight, and I thought I'd share. It's been well received by fellow hikers, and it has become my staple lunch/snack food. I've found recipes online, but they all seem to call for loads of oil or something else I don't want to include. This is made from ingredients I try to keep stocked anyway.
Fresh from the oven (phone pic):
Texture close up:
3 C whole wheat flour
3 C AP flour
2/3 C powdered milk
2 tsp salt
1/2 tsp freshly grated nutmeg
1 tsp baking powder
1 tsp baking soda
1 C old fashioned oats
1/2 C wheat germ
2/3 C chopped nuts (I've been using pecans)
1/2 C dark brown sugar
1 C chopped dried fruit (this batch was half strawberries and half dates)
1/2 C melted butter
2 eggs, beaten
1 C honey, warmed
~1 C warm water (this batch used about 1.25 C)
Mix the dry ingredients together in a very large bowl, aerating well. Toast the oats, wheat germ, and nuts in a 350F oven for 5 minutes, stir/flip, and toast another 3 minutes. (Tip: don't go too long; if you smell the nuts with the oven closed, they're burned.) Add to dry mix. Add the sugar and fruit and mix well.
Melt the butter; meanwhile, whisk the eggs. Heat the honey. (Tip: this is the best time to grease the pan since you're about to knead.) Add the remainder of the wet ingredients, reserving some of the water in case less than a cup is enough. Knead. (I manage this one handed; if you have a stand mixer, I'm jealous.) The dough should be thick and sticky; you will get club hand if you're doing this by hand.
Grease a 9"x13" baking dish and spread out best you can. Bake at 350F for 40 to 50 minutes. 40 minutes will leave it moister, 50 minutes will make it dry enough to last a respectable amount of time without freezing or refrigeration. I'm assuming 60 minutes makes it bone dry, good for longevity, bad for taste.
Totals (not portioned out): 6624 cal, 171.2g fat, 1200g carb of which 98.9g fiber and 377.4g sugar, 161.7g protein.
In 36 pieces, each piece then: 184 cal, 4.76g fat, 33.3g carb of which 2.75g fiber and 10.5g sugar, 4.5g protein.
Edit: Total weight 74.6 oz not completely cool or dry. 8 pieces from the center in a freezer bag: 16.2 oz. So admittedly, below the ideal calories per ounce. But delicious! And this is the wettest batch I've made yet; the center was still nice and moist like banana bread should be.