How do u know when cookies are done?

Online Answer
Open up the oven, pull out the rack a bit, and push the sides of the cookie very lightly with a spatula or your finger. If the edge stays firm and doesn't fall inwards, then your cookies are done. If you leave a noticeable indention, then your cookies likely need a few minutes more in the oven..
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Your baked goods won't stick to it, and when you're done you can throw out the parchment instead of washing the pan. If you have no parchment paper, you can still bakeyou'll just have to be a bit more creative..
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To save these cookies, I let them completely cool first. Then continue baking them at 180 degrees C for 5 minutes. After which, turn off the oven, and again leave them in and let the trapped heat continue cooking them.