it makes the cake rise in the oven
Brownies are usually more forgiving because they don't need to rise like a cake and if they are uneven, they are still wonderful
The purpose of baking soda in a cake is to make the cake rise. Hope this helps you! :)
Baking soda reacts with acidic ingredients in cake batter, producing gas which causes the cake to rise.
Baking powder is better. see http://video.answers.com/baking-soda-vs-baking-powder-290159125
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