Oatmeal Cake with Coconut Topping

First, preheat your oven to the desired temperature of 350 degrees Fahrenheit or 175 degrees Celsius. Next, take a moment to prepare your baking vessel by greasing it with cooking spray.

To begin the cake's preparation, pour boiling water over rolled oats in a small bowl and mix until they're fully incorporated. Allow the mixture to cool down before moving on to the next step.

In a large mixing bowl, combine brown sugar, white sugar, and softened butter. Beat the mixture until it's smooth and creamy, then add eggs one at a time to continue blending. In a separate bowl, whisk together flour, baking soda, cinnamon, nutmeg, and salt before adding them to the wet ingredients. Finally, stir in the cooled oat mixture until everything is well combined.

Pour the cake batter into your prepared 9x13-inch pan and bake in the preheated oven until a toothpick inserted into the center comes out clean, approximately 35 minutes.

While the cake is baking in the oven, prepare the topping mixture. In a mixing bowl, combine shredded coconut, white sugar, and brown sugar before adding melted butter, cream, and vanilla extract. Stir the mixture until everything is fully incorporated.

Once the cake has finished baking, remove it from the oven and turn on your broiler. Using a spoon, drop small amounts of the topping mixture onto the surface of the cake. Then, carefully spread the topping into an even layer to cover the entire surface.

Place the cake under the preheated broiler until the topping is bubbly and lightly browned, approximately 2 to 5 minutes.