Copy and paste from the following website.
http://www.number-2-pencil.com/2012/03/06/chocolate-chip-cookie-in-cup/
| Butter 黄油 | 1 tbsp |
| Granulated White Sugar 白砂糖 | 1 tbsp |
| Dark Brown Sugar 红糖 | 1 firmly packed tbsp （压实的） |
| Vanilla Extract 香草精 | 3 drops |
| Kosher Salt 盐 | some |
| Egg yolk 蛋黄 | 1 |
| Flour 面粉 | Scant 1/4 cup 稍少于1/4 cup |
| Semi sweet chocolate chips | 2 heaping tbsp 两冒尖的tbsp |
Start by melting your butter in the microwave. Butter should just be melted, not boiling. 微波炉融化黄油，不要过热到沸腾
Add sugars, vanilla and salt. Stir to combine. 加糖，香草精，盐，搅匀
Separate your egg and add the yolk only to your cup. Stir to combine. 加蛋黄，搅匀
Add flour, then stir again. Measure a scant, slightly less than full, ¼ cup of all-purpose flour. 加面粉搅匀
Add the chocolate chips, and give a final stir. Now your mixture will look like cookie dough. 加巧克力豆，稍微搅一下
Cook in microwave 40-60 seconds, start checking for doneness at 40 seconds. Mine takes 50 seconds. Do not cook past one minute, just like a regular cookie, this will continue cooking as it cools. If the cookie is dry or cake like, try less time. 微波炉加热40秒后注意成熟度，最好不超过一分钟。因为之后放置冷却还需要时间，这个过程也在加热饼干。如果最终饼干太干就需要减少微波的时间了
