Cookies had no flavor! Please help!
I baked some cookies that came out with no flavor at all. It was the tollhouse cookie recipe. I used mango flavoring instead of vanilla and light brown sugar for all of the sugar and did not put any chocolate chips in. The mango flavoring is not expired. I added another teaspoon after the first cooked batch came out flavorless. It didn't help. I didn't forget to put salt in. I don't understand where the flavor went. I have never had this happen in 50 years of baking. Please assist.