baking question
i've been baking my grandmother's czech poppy seed loaf cake for over 40 years & it's my husband's favorite. the last 2 times i made it the center of the loaf caved in a bit & the sides on one kind of curled inward towards the center a little. i can't figure out why this happened. the only differences that i can name is that i've made them in emile henri ceramic loaf pans instead of metal or glass pans i used to use. and i've also used organic eggs. i can't see any reason why either of those things would make a difference. any ideas or suggestions?

thanks i'll try it. the cake tester actually came out batter-y at the usual time & i had to extend the baking time. the caving took place during that extra time.maybe it'll be different if i turn the oven off & just leave it.