Cook potatoes in water with sugar and vanilla until tender, ensuring the water covers the potatoes.

Butter the sides of a baking pan.

Prepare a biscuit dough.

Pinch off pieces of dough, pat them out, and line the buttered pan with the dough.

Pour the cooked sweet potatoes into the pan.

Dot the sweet potatoes with butter.

Cover the sweet potatoes with the remaining dough.

Dot the top dough with more butter and sprinkle with sugar.

Bake in the oven until golden brown.

Remove from the oven and place on the stovetop.

Let it boil for 10 to 15 minutes.

Add milk and let it boil for another 5 minutes.

Let it cool before serving.