Whoopie pies with powdered sugar

Photo: Magnolia Bakery

7 of 8
Same-Size Cookies That Don't Spread

Like most professional bakeries, Magnolia uses a cookie scoop to measure out dough. Then, bakers level each scoop and place them flat side down on a cookie sheet. The trick here is in the butter temperature: To avoid creeping cookies, they put the sheet in the refrigerator for a half hour before baking.