Spread into the prepared baking dish and bake until a toothpick inserted comes out clean with only a few moist crumbs.
While the cake is baking, prepare the topping which is a mixture of melted butter, light brown sugar, milk, vanilla, shredded coconut, and chopped pecans. If you don’t want to add nuts to the topping, you can easily omit them. When the cake comes out of the oven, spread the prepared topping on top of the warm cake and put it back into the oven to bake on the broil setting. You don’t want to walk away from the oven during the broiling, as the topping can go from golden to gone in a matter of seconds.
After a thirty-minute rest, the Oatmeal Cake is ready to slice and serve! The cake is filled with earthy oats and laced with warm notes of cinnamon and nutmeg.