How can you tell if a cookie is baked through?

Explanation:

Doing a Physical Check. Press the edges with your finger. 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.

pretty much when you can poke it with a stick and it comes out clean. Almost like a cake.