Here are some helpful solutions for the common causes:
- When baking with a no-stick cooking spray, be sure pans are washed well. Any cooking spray left on the pan will become sticky and can cause cookie bars to stick the next time you bake with it.
- Line the baking pan with parchment paper or waxed paper. When using waxed paper, spray or lightly grease the pan, then place the waxed paper in the pan. Finally, lightly spray or grease the waxed paper.
- Liquid fats can often be absorbed into the batter. For best results, either use a no-stick cookie spray, solid shortening, or line the pan with wax paper, parchment paper, or aluminum foil.
- When using waxed paper, spray or lightly grease the pan, then place the waxed paper in the pan. Finally, lightly spray or grease the waxed paper.
- When using aluminum foil, turn the pan upside down and "mold" a piece of foil around the pan. Remove "mold" from pan and turn pan right-side up. Place the foil mold into the pan and lightly grease the aluminum foil with a no-stick cooking spray or solid shortening.
Depending upon the recipe or the age and condition of the baking pan, even bar cookies baked in nonstick pans can occasionally stick. Spray pan with a no-stick cooking spray. After you are finished baking, make sure the baking pan is washed well – any cooking spray left on the pan will become sticky and can cause cookie bars to stick the next time you bake with it.
The amount of fat in the cookie dough or batter affects how easily the baked bar cookies can be removed from the baking pan. Follow recipe directions, and lightly spray the pan with no-stick cooking spray. After you are finished baking, make sure the baking pan is washed well – any cooking spray left on the pan will become sticky and can cause cookie bars to stick the next time you bake with it. While cooling bar cookies completely will make it easier to remove them from the pan, be sure to remove the bars as soon as sufficiently cooled. Store them in an airtight container to avoid having the bars dry out.
Grease baking pan well or spray well with no-cook cooking spray. While cooling cookies completely will make it easier to remove them from the pan, be sure to remove the bars as soon as sufficiently cooled. Store them in an airtight container to avoid having the bars dry out. Learn more about High-Altitude Baking.
