Here's what they published for the Canadian branch of scouting in 1911..., very similar to Black Hand's link, but with some editing...,
From the:
Canadian Boy Scout Handbook
By Sir Robert Baden-Powell. 1911
“The three B’s of life in camp are the ability to cook bannocks, beans, and bacon.”
To make bread, or bannocks, the usual way is for a scout to take off his coat, spread it on the ground, with the inside uppermost (so that any mess he makes in it will not show outwardly when he wears his coat afterwards). Then he washes his hands thoroughly. Then he makes a pile of flour on the coat, and scoops out the centre until it forms a cup for the water, which he then pours in; he then mixes the dough with a pinch or two of salt, and of baking powder or Eno’s Fruit Salt, and kneads and mixes it well together until if forms a lump of well mixed dough. Then, with a little fresh flour sprinkled over the hands to prevent the dough sticking to them, he pats it and makes it into the shape of a large bun or buns."
(That's kinda hard-core, eh?)
"Then he puts it on a gridiron over hot ashes, or sweeps part of the fire to one side, and on the hot ground left there he puts his dough, and piles hot ashes round it and lets I bake itself.
Only small loaves, or bannocks, like buns, can be made in this way.
”¦, Another way is to cut a stout club, sharpen its thin end, peel it, and heat it in the fire. Make a long strip of dough, about two inches wide and half an inch thick; wind it spirally down the club; then plant the club close to the fire and let the dough toast itself, just giving the club a turn now and then.”
“The best kind of bread for camp is what the Boers and most South African hunters use, and that is “rusks”. Rusks are easily made. You buy a stale loaf at the baker’s, cut it up into thick slices or square “junks”, and then bake these in an oven or toast them before a hot fire till they are quite hard like biscuits. They can then be carried in a spare haversack or bag, and do very well instead of bread. Soft bread gets damp and sour and stale in camp.”
Johann Edwald, commander of the Hessian Jaegers in America during the AWI, noted in his journal, about 135 years prior, that Zwiebach, "twice baked" bread was the best for bread rations for his men. Slicing a loaf fo bread into portions that sort of resemble biscotti, and then baking them a second time was the process. Looks like things hadn't changed by the time Baden-Powell got to South Africa and was associating with the Boers who were Dutch.
LD