Plum Blueberry Cake

First, preheat the oven to its highest temperature setting, which is equivalent to 350 degrees Fahrenheit or 175 degrees Celsius. Next, take a non-stick cooking spray and apply it liberally to a 9-inch round cake pan. Now, mix together three essential dry ingredients - flour, baking powder, and salt - in a separate bowl and set them aside for the time being.

In another bowl, combine three tablespoons of brown sugar with a generous amount of butter until they form a smooth and creamy mixture. Place this mixture into the prepared cake pan and put it in the oven to melt the butter and create a gentle bubble. Once this process is complete, remove the pan from the oven and set it aside for a short while.

In a large mixing bowl, use an electric mixer to cream together one cup of white sugar and one-third cup of butter until they become light, fluffy, and utterly smooth. Next, add in an egg and mix well, followed by the addition of a hint of vanilla flavoring. Now, gradually incorporate the dry ingredients you set aside earlier into the mixture, alternating with a small amount of milk until just combined.

Arrange a selection of plums around the edges of the cake pan, overlapping them slightly to create a beautiful and colorful pattern. In the center of the pan, distribute a handful of blueberries to add a pop of color and flavor. Pour the batter into the prepared pan, making sure to cover the fruit completely.

Finally, place the cake in the oven and bake for 40 minutes, or until a toothpick inserted into the center of the cake comes out clean. Once done, allow the cake to cool for 15 minutes before serving.