A different temperature from the one given in the recipe was used.
Select the temperature required for the recipe.
Cakes/biscuits are not cooked properly after the duration given 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 grilling or roasting.
Use dark, thin tins if possible.
Check the ingredients and adjust the cooking duration.