To begin, preheat your oven to 350°F (175°C). This is an important first step that prepares the oven to bake your cake just right. Next, grease a 9×13-inch baking dish using non-stick cooking spray, setting it aside for later.

In a large mixing bowl, whisk together the flour, sugar, baking powder, nutmeg, and salt. This mix of dry ingredients sets the foundation for your delicious cake. In another medium mixing bowl, combine your cooked and mashed sweet potatoes with the milk. Mix this together and then stir in the beaten eggs and vanilla extract.

Now, add the wet mixture to the dry mixture. Stir gently, but just until combined—no need to overwork the batter! Next, fold in the melted butter until fully incorporated. Pour this lovely batter into your prepared baking dish.

For the crumble topping, grab another medium mixing bowl. Combine the brown sugar, 2 tablespoons of flour, and cinnamon. Cut in the softened butter, mixing until your topping is crumbly. This will provide a wonderful texture on top of your cake. Sprinkle the crumble over the batter and gently swirl it in.

Now, it’s time to bake! Place the dish in your preheated oven and bake for 35-40 minutes. Your cake is ready when a toothpick inserted into the center comes out clean. While the cake is cooling slightly, prepare your glaze by mixing the powdered sugar, milk, maple syrup, vanilla extract, and ground cinnamon in a medium bowl. Pour the glaze over your warm cake and if you like, sprinkle chopped pecans on top.