What will happen if you use baking powder AND self-raising flour?

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What will happen if you use baking powder AND self-raising flour?
for 1 why, its already in there. but if you do it will rise more than you would want, cause in you product to lose its texture and will be dry and crusty.but good luck says bacondebakerWhat will happen if you use baking powder AND self-raising flour?
Nothing. Add a bit of water and it makes a refreshing drink.
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