From the sources
“וַיֹּ֣אמֶר אֱלֹהִ֗ים תַּֽדְשֵׁ֤א הָאָ֙רֶץ֙ דֶּ֔שֶׁא עֵ֚שֶׂב מַזְרִ֣יעַ זֶ֔רַע עֵ֣ץ פְּרִ֞י עֹ֤שֶׂה פְּרִי֙ לְמִינ֔וֹ אֲשֶׁ֥ר זַרְעוֹ־ב֖וֹ עַל־הָאָ֑רֶץ וַֽיְהִי־כֵֽן׃” (Bereishit א:יא)
“And God said, “Let the earth sprout vegetation: seed-bearing plants, fruit trees of every kind on earth that bear fruit with the seed in it.” And it was so.” (Bereishit 1:11)
Rashi, on the words עֵ֣ץ פְּרִ֞י (fruit trees), says that originally the trees were commanded to come into existence so that any part of the tree could be eaten: the bark, the leaves and so on. The Midrash relates that the trees reasoned that if the whole tree were edible, then people would eat the whole tree and therefore the tree would be destroyed. So they grew themselves to be trees where only the fruit was edible. Originally every tree was edible, but as a punishment for the trees disobeying His command, Hashem made many trees that do not bear fruit at all.
How to eat it
In memory of the fact that THE WHOLE OF EVERY TREE was supposed to be edible, I thought it would be nice to use some “non-fruit” parts of trees for food. For example:
-cinnamon sticks: use in warm apple juice to make a delicious warming beverage, or be sure to sprinkle some cinnamon into the apple pie (see below)
-maple syrup: serve over ice cream or pancakes
-tea: while you are sipping your tea this Shabbat, remember it is made from leaves of a tree