Preheat oven to 350°.

Mix mashed sweet potatoes, white sugar, eggs, 1/4 cup butter, vanilla and flaked coconut. Place in heat proof 2 qt. size casserole dish.

With a fork, mix the brow.sugar, flour, pecans and the remaining 1/3 cup of butter. Sprinkle over the top of the potato mixture. Bake at 350°for 30 minutes.