I am a 1/2 butter stick short for a pre boxed cookie mix. How that affect the cookies?
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I havent used cookie mixes, but i imagine they will probably be quite a bit puffier/drier than intended. I would add 1/4 oil to compensate
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What are the instructions on the box? How much butter is supposed to be added?
If you have margarine, you can also use that instead of the butter.