"Why don't my cookies look like yours? Mine are too flat."
The problem is the pan--it's silver instead of dark. A silver pan reflects heat rather than absorbing it. The cookies take longer to bake and spread until they bake long enough to set. Instead of the cookies having a nice profile, they look like pancakes.
Don't put too much shortening on your pan. Too much grease on the pan and the cookies spread more. Wipe the pan between batches. Better yet, use parchment paper.
3. The right oven temperature
Cookies spread more at a lower temperature. They spread until the heat sets the cookies. Use an oven thermometer to see if the oven is really 350 degrees.
4. Cold dough
Cold dough acts differently than warm dough. Don't let your butter melt. Refrigerate your dough between batches.
