My brownies were rubber-like in texture, and full of air holes. Why would this happen?

Recipe followed exactly.My brownies were rubber-like in texture, and full of air holes. Why would this happen?
You didn't stir the batter enough. You had air holes where the pockets of unmixed-in batter were. Your oven also may not be calibrated correctly, and they may have cooked at too high a temp. Get a cheap oven thermometer and keep it in there, so you can be sure it's always the right tempMy brownies were rubber-like in texture, and full of air holes. Why would this happen?
you did not get what you expected.