Follow these simple steps to create your Sweet Potato Casserole:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Prepare Sweet Potatoes: Peel and cut sweet potatoes into chunks. Boil in a large pot until tender, about 15-20 minutes. Drain and mash until smooth.
3. Mix Ingredients: In a large mixing bowl, combine mashed sweet potatoes, granulated sugar, softened butter, milk, eggs, vanilla extract, cinnamon, nutmeg, and salt. Mix until completely blended and smooth.
4. Transfer to Baking Dish: Pour the sweet potato mixture into a greased 9×13-inch baking dish, spreading it evenly.
5. Prepare Topping: In a separate bowl, combine chopped pecans, brown sugar, and optional mini marshmallows for a sweet topping.
6. Top Casserole: Sprinkle the topping mixture evenly over the sweet potato mixture.
7. Bake: Place the baking dish in the preheated oven and bake for 30-35 minutes, or until the topping is slightly golden and the casserole is heated through.
8. Cool and Serve: Once out of the oven, let it cool for a few minutes before serving.

With these easy-to-follow steps, you’ll create an incredible Sweet Potato Casserole that’s sure to impress friends and family alike.