Preheat the Oven: Start by preheating your oven to 350°F (175°C).
Prepare Sweet Potatoes: In a large bowl, mix the cooked and mashed sweet potatoes with brown sugar, cinnamon, and nutmeg. Ensure it’s a smooth consistency.
Layer the Mixture: Pour the sweet potato mixture into a greased 9x13 inch baking dish, spreading it evenly across the bottom.
Add the Cake Mix: Next, sprinkle the dry cake mix evenly over the sweet potatoes. No mixing is required here; just let it fall naturally over the surface.
Add Pecans: If you're using pecans, sprinkle them generously on top of the cake mix for that crunchy texture.
Melt the Butter: Pour melted butter all over the cake mix, covering it as evenly as possible.
Bake: Pour 1 cup of water around the edges of the dish (to keep everything moist), then bake for 30-35 minutes until the top is bubbly and golden brown.
Cool and Serve: Allow the cake to cool slightly before serving. Top it off with whipped cream or vanilla ice cream for an indulgent twist!