Southern Sweet Potato Casserole

Ingredients:
3 cups sweet potatoes
1⁄2 cup sugar
1⁄2 cup butter, softened
2 eggs, whisked
1 teaspoon vanilla extract
1⁄3 cup milk (or heavy cream for a richer flavor)
Topping Ingredients:
1⁄3 cup melted butter
1 cup light brown sugar
1⁄2 cup all-purpose flour
1 cup coarsely chopped pecans
Steps: