This is another tip, courtesy of my mom. Just as ovens often don’t have an accurate temperature dial, they have a tendency to bake unevenly.
Rotating your pan 180 degrees midway through the baking process will help ensure your confections bake evenly.
The February 2011 issue of Reader’s Digest suggests lining a cookie sheet with a layer of white bread slices and baking them under the broiler to determine where your oven is the hottest. From there you can better figure out how to rotate your pans for more even baking. For the full how-to, check out 3 Shortcuts From All Over.
(Thanks to Dad, who passed along the Reader’s Digest article.)