I looked up hazle nut and that's not it. It does look like the sawtooth oak. I've never seen this tree before. It's native of Japan and Korea. Planted as wildlife food because of abundance of nuts at an early age. I was on gamelands when I found them so the planting for food makes sense to me. The bears were braking the branches off the trees to get to the nuts. Bear crap everywhere.
You can't get one sitting at home on the couch.
<<< Me and Earl Flint down by the Tionesta Creek
If you do a little Googling you will find plenty of info about eating acorns. They provided a staple food for the Indians. And some early settlers. And some people into foraging still make acorn meal / flour.
The acorns from the white oak family are considered better than those from the red oak family.
The acorns, or the ground acorn meal, are leached, to remove the tannins, before eating.