Making Sweet Potato Casserole is a simple yet rewarding process. Follow these steps for a delicious outcome:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Prepare Sweet Potatoes: Peel and chop the sweet potatoes into chunks. Boil them in a large pot of water until tender, about 15-20 minutes.
3. Drain and Mash: Drain the sweet potatoes and return them to the pot. Mash until smooth.
4. Mix Ingredients: In a large bowl, combine the mashed sweet potatoes, sugar, melted butter, milk, eggs, vanilla extract, cinnamon, and nutmeg. Mix until well combined.
5. Transfer to Baking Dish: Pour the sweet potato mixture into a greased 9×13-inch baking dish, spreading it evenly.
6. Add Toppings: If using, sprinkle mini marshmallows and chopped pecans evenly over the top.
7. Bake: Place the dish in the preheated oven and bake for 30-35 minutes, or until the top is golden and bubbly.
8. Cool Slightly: Remove from oven and let it cool for a few minutes before serving.

These easy steps will guide you in creating a Sweet Potato Casserole that will be the highlight of your meal.