Step 1

Preheat the oven to 350 degrees Fahrenheit. Grease a 2 1/2-quart baking dish with butter.

Step 2

Rinse and scrub sweet potatoes well. Poke them all over with a fork and bake on a baking sheet covered with foil for 1 hour. Peel once cool enough to the touch.

Step 3

In a large bowl, place the peeled sweet potatoes and mash them until very smooth. Add the eggs, sugar, butter, vanilla, milk, and salt. Beat together with an electric mixer until well-combined. Pour the mixture into the greased baking dish.

Step 4

Make the topping: In a bowl, mix together the pecans, brown sugar, flour, and butter until the mixture resembles wet sand with lumps. Spoon the topping over the sweet potatoes.

Step 5

Bake for 40 minutes, or until the top is slightly brown. Let the casserole sit for 5 minutes before serving. Enjoy!