The butter and eggs will cream together and become more easily incorporated with the other components of the batter if you proceed in this manner.
The majority of loaf cakes, including this one, require a significant amount of time to bake,
and the sides of the cake have a tendency to brown well before the interior is baked.
Although this is perfectly natural, it is recommended that you use a metal pan
with a lighter hue rather than a darker one in order to reduce the amount of browning that occurs.
If, on the other hand, you are preparing a cake from scratch,
you should increase your chances of success by beginning with components that have been appropriately tempered.