Cookies...no thanks

Cody had to stay home from school because he had come home with fever the day before and he wanted to make cookies. He did it all by himself and followed the recipie...except he added milk, and an extra teaspoon of salt. (he wanted to make it his own) and then instead of baking soda he used baking powder and they turned out very salty and bitter to me...but he and the other kids liked them!