banana cake I made

Two months ago, I made my New Year resolution that I have to make a cake this year. (the last time I bake was 10 years ago, I baked a set of different cakes for preparing my home economics exam.) So I finally did it this morning, a banana cake from a easy recipe. Well here's the finished product looks like:

The recipe wasn't difficult at all. I mixed sugar, egg, butter, baking soda and everything the instruction said. then, I added a mixture of all purpose flours stirring all of them til smooth. It might sounds a little dirty; I ended up stir them with my hand since using plastic scrapers to stir was taking like forever. Lastly, I coated a little butter on the inner surface of a baking tray, then put the portion onto that baking tray, cooking immediately.

The end results were not good as I expected. There's a little burnt on a little part of the banana cake. But the finish time seems shorter than the recipe said. The recipe said 1 hour, but it actually fully cooked in 45 minutes. I cut out the little burnt part, and the taste was good! Just like regular banana cake but mine is not so sweet, and that's the way I like it. I don't know what I did wrong that my cake comes out has a little burnt part. I think I will try to email the author who wrote the recipe, hopefully I can find out the solution.