very simple recipe with a very short rise time of less than 30 min. Flour, sugar, yeast, salt, water and veg oil. I make 3 loaves at a time and this has only happened mayne 3 or 4 times. Sour might be the right word - I can tell as soon as it comes out of the oven. I use my KitchenAid mixer, which has saved me lots of time. I believe I got the recipe a year or so ago on Cook.com. My husband and son will eat it no matter how it tastes, but I am more picky. We decided when bread got so expensive that is was cheaper and tasted better to make it at home. Any help you can give me will be a big help.