A different temperature than that given in the recipe was used.
Select the temperature required for the recipe.
Cakes/cookies are not baked properly after the duration specified in the cooking chart.
Select the temperature required for the recipe.
Extend the cooking duration.
Remove any accessories that are not being used from the oven. Also remove the grease filter from the oven, as this obstructs the flow of air. Only insert the grease filter when broiling or roasting.
Use dark, thin baking pans if possible.
Check the ingredients and adjust the cooking duration.