My two WORST blunders......
(1) I made sugar cookies one time and forgot the sugar. Actually they tasted like little flat biscuits.
(2) As a very young newlywed, I discovered that two large fresh jalapeno peppers are not a good substitute for 1/2 cup green pepper in spaghetti sauce. Even though we're from Texas and eat a lot of hot spicy food, neither one of us could eat that spaghetti!