Ashley at Practical Self Reliance has written a good, long post on making bread from pine tree bark., at least in part. The ratio of wheat flour to pine bark flour is about 3.5 to 1. We live where pine trees are some of the few trees that will grow without irrigation, so I’m always on the lookout for ways that they can be used to supplement food in an emergency. Most people are aware that you can get pine nuts from appropriate species. Fewer may be aware that you can make pine needle tea which is high in vitamin C and A. Ashley documents the harvesting of the bark and bad effects on the trees themselves, grinds the bark into flour, and then makes some bad-tasting crackers and some good-tasting yeast bread.
Having the option to add pine tree bark would help in the less likely scenario where you are faced with a major TEOTWAWKI style disaster that occurs past the time that you can grow or store more wheat for the year, and you need to stretch your food reserves until foods can start growing again in the spring. Ashley also has a post How to Eat a Pine Tree for using other parts of the tree. You may just find that you like the flavor. My first taste for pine-flavored food came from drinking Retsina – an Aleppo Pine resin infused white wine – at Greek restaurants. Some can’t stand the flavor, but it goes well with some strong flavored dishes.
Bark breads are a staple of Nordic indigenous cuisine. The Sami of northern Sweden harvested pine bark and mixed it with reindeer milk in their traditional breads. Since the richest sami had the most reindeer, they’re also the ones that harvested the most pine bark. It wasn’t out of desperation, but out of a quest for flavor.
In the case of birch bark, the historical evidence is clear that the papery outer bark was used to make food storage vessels, while the nutritious inner bark was ground into birch bark flour. In the case of pine bark, the records are a bit less clear. There are some sources that say only the inner bark was used, and others that claim only the outer bark was used. Since I’ve been able to find recipes using both, I’ll share them all with you.
The outer bark of a tree is mostly there to protect the tree from the elements and doesn’t contain much in the way of calories. Calories aren’t the only reason to eat something, and pine outer bark seems to have other benefits. Pine outer bark may contain compounds that help keep food from spoiling or important nutrients that were scarce in a northern climate.
According to Nordic Food Lab, though pine outer bark is not calorie rich, it does “contain condensed tannins called procyanidins that are being researched for potential health benefits. Aromatic hydrocarbons such as terpenes and phenols which give pine its distinctive warm, woody scent also deliver antimicrobial properties, perhaps useful for blending with other flours to preserve their shelf life.”
These days, nutritional supplements are made from pine bark, and you can buy bags of powdered pine bark online which claim that “Pine Bark is used worldwide for its antioxidants and anti-inflammatory properties. When used regularly, pine bark may support healthier cardiovascular and circulatory function.”
The outer bark was harvested from a section of the tree to create a “window pane” of exposed cambium. Over time, the bark slowly healed over the wound, and since the inner cambium was not harvested the tree continued to grow. Such trees could be harvested multiple times over the course of their life. There’s evidence of window panning on 700+-year-old pine trees in northern Sweden.
Obviously, if you’re going to harvest the bark of a tree, know that you are damaging the tree in a way that will impact it for hundreds of years. This particular pine tree has a partially dead top, and it’s very near our wind turbine. It’s going to be cut in the spring, so it’s a good candidate for bark harvest.
I started out using a draw knife, but it’s actually pretty difficult to use one just on the surface without really digging into the cambium. Since I only needed a small amount of pine bark flour, I was able to just use my hand to flake off chunks of shaggy exterior bark from a large pine tree growing on our land. No need to window pane a tree and cause it damage in any case.
Initially, I tried to grind the pine bark flour in a food processor, but it was in vain. The exterior bark is quite hard, but not brittle enough to fly apart. After several minutes the motor was heating up and had almost no pine bark flour to show for it. The bark, even exterior bark, needs to be dried out thoroughly before grinding.
I put the bark chips in the oven at 350 for about 45 minutes. The house smelled nice and toasty, like the warm scents of the high desert pine forests of my youth. Once the bark was toasted it ground much more easily. It would be possible to dry the bark out over a low fire in a similar way, which would make it much easier to grind by hand. When the pine bark was dried, I put it back into the food processor for grinding…