这个度量衡（杯克）转换比较准！亲自测验过的！

1 cup of all-purpose flour: 142 grams ~ 150
1 cup of bread flour: 156 grams ~160
1 cup of cake flour: 128 grams ~130
1 cup of whole wheat flour: 142 grams ~ 150
1 cup of corn meal: 128 grams ~130

1 cup of cocoa: 94 grams ~100

1 cup of sugar: 198 grams ~200
1 cup of powdered sugar: 114 grams ~110
1 cup of light brown sugar: 213 grams ~215
1 cup of dark brown sugar: 241 grams ~ 240
1 cup of molasses: 319 grams ~ 320
1 cup of corn syrup: 326 grams ~ 325

1 cup of butter: 227 grams ~ 230 (or 14.2 grams ~ 15 per tablespoon)
1 cup of shortening: 191 grams ~ 190
1 cup of vegetable oil: 191 grams ~ 190

1 large egg: 50 grams
1 large egg white: 28 grams ~ 30
1 large egg yolk: 18 grams ~ 20

1 cup of water: 235 grams (the pint\'s a pound thing is slightly mistaken)
1 cup of milk : 240 grams
1 cup of buttermilk: 240 grams
1 cup of sour cream: 240 grams
1 cup of half & half: 240 grams
1 cup of heavy cream: 230 grams

1 cup of powdered milk: 71 grams ~ 70