*If your butter is scorching hot it will melt your sugars and your cookies will spread all over your baking pan. The butter can still be warm, but should not be hot.
**If you are using cups, the best way to measure out your flour is to stir it in its bag/container then spoon it into your measuring cup and level off the measuring cup. Packing in your flour (over-measuring it) will leave you with a dry/crumbly cookie dough.
Store any leftover, cooled cookies in an airtight container at room temperature for 3-5 days.