Ancient Recipe: Pine Bark Flour and Bread

The girl decided to repeat the ancient Scandinavian recipe and show what happened on social networks. Everything is surprisingly very simple. For the manufacture of flour, the inner bark of the tree is used (by the way, at this point the author was mistaken), which is not as tart and bitter as the outer one. It is harvested in a certain amount, then dried (possibly in the oven), and then ground to a state of flour. After that, a small amount of ordinary flour is added, a standard batch is made and bread is baked. I haven't tried it, but I'm curious how it tastes.