I'm reading a review of cake pans.
Most of the round pans in the review are 2 inches tall. However, there is one round pan in the review that is 2.5 inches tall, and the review had the following comment about it:
It baked an evenly golden cake, but it was half an inch taller than any other pan, tall enough to bake the top of the cake darker than any other.
Why would baking a cake in a tall pan make the top of the cake darker?