300 grams = 1.305 cups for butter, I suggest using 1 cup + 5 Tbsp coversion charts: http://www.gourmetsleuth.com/gram_calc.htm http://www.ochef.com/837.htm
http://wiki.answers.com/Q/Cups+in+100+grams+of+but...

A cup is approximately 8 ounces, and there are 28.34 grams in an ounce. Once you know this information, doing the math necessary to work out how many grams are in a cup is easy. 28.34
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Twohundred grams is equal to seveneights of a cup. Enjoy your cooking and
http://www.chacha.com/question/whatis200gramso...

1 cup of butter=225 to 250grams, the 25 grams of difference won't be too noticeable. happy baking!
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