I need some specific help please....I am a home baker, going into a commercial kitchen to produce my biscotti for my new business. The first batch I baked at 325, the outside cooked really fast, inside was raw. When I sliced for the second bake the biscotti spread in the middle making the biscotti not uniform in shape. The second time at the kitchen I thought I would lower the oven temp to 275 so the biscotti would not bake so quickly on the outside, the biscotti bakes slower, spread really wide and some was undercooked in the middle anyway. When I did the second bake I timed it for 8 min. as that is how long I usually bake the second bake. Out of 360 biscotti I think 6-9 were like they should be. They turned out too hard, too chrunchy so were not good representation of the biscotti that I bake that everyone loves. Today I am going in a third time and am going to try to put an upside down sheet pan over my baking pan to keep the hot air from hitting the biscotti til the center begins to cook....any help you can give me would be appreciated.