For the fudgiest texture, stick closer to 8 minutes of baking time.
Bake in the middle of the oven to prevent burning.
Use good quality cocoa powder for a richer chocolate flavor.
If you don’t like coffee, you can skip the instant coffee, but it really brings out the chocolate taste.
Make sure to leave plenty of space between cookies because they spread a lot. Four to a cookie sheet will keep them from touching, six if you are fine with them touching a little.
Transfer the cookies off the baking sheet right away so they stay soft in the middle.
Immediately after baking, use a round bowl to gently scoot and round out the cookies. This helps “fluff” up the edges, which can be a bit flat straight from the oven.
If you live in a hot climate and the dough is super runny, try putting it in the fridge for 30 minutes to an hour before baking.