Identifying Situational Irony in a Bakery Contest

In a small town, there was a bakery known for its delicious bread and pastries. One day, the baker decided to enter a baking contest, confident that his famous chocolate cake would win. However, when the results were announced, the baker felt like a fool because he forgot to put sugar in his cake, making it taste terrible. In the end, a young girl won with her simple but sweet vanilla cupcakes, leaving the baker in disbelief.

What type of irony is illustrated in this scenario?