First welcome. Let me first address baking powder. Add your baking powder to the dough before you add flour. My cookie teacher told me baking powder binds to flour and to add it to the dough, mix and then add flour. I do the same with salt and spices in my cookies. Now to your cookies. I’m wondering If you are mixing up raw with just cooked. I was taught that as soon as I see a little tan on one cookie to pull my cookies out. I get rave reviews on my cookies. If they truly are raw then get your oven checked. If one part is raw and another burnt then it’s definitely the oven. I do not bake my cookies as long as you because they would be burnt. Good luck.