My sponge cake fell flat and I finally figured out why after 8 tries
I have been trying to perfect a vanilla sponge cake for about 2 months now. Every single time I pulled it out of the oven it would sink right in the middle after a few minutes. I tried different pans, different oven temps, even a new mixer. Finally this past Tuesday I realized my baking powder was sitting in my cabinet for over a year. Picked up a fresh can and boom the cake rose perfect and stayed that way. Has anyone else had a simple ingredient go bad on them without noticing?