Hello, All! I have been using the same Simple Yellow Cake recipe for some time now. I use the same brand of ingredients, the same equipment, oven, etc. I decided to alter the cake recipe by using Almond extract instead of Vanilla extract, and the cake sunk in. I figured I may have been distracted and made a mistake, so I waited a couple of days and tried it again. Again, my cake caved in. Could the extract have had something to do with it? I bake every few days and none of my ingredients are old...! I just don't know what it is, and I am not a happy camper. Please help!!