Preheat oven to 375 degrees.
Spray a 1-quart soufflé dish with cooking spray. Microwave 6 tablespoons butter on HIGH until melted. Let it cool 3.
In a large mixing bowl, stir together beaten eggs, mashed sweet potatoes, evaporated milk, salt, vanilla, pumpkin pie spice, 3/4 cup of the brown sugar and 3 tablespoons of the melted butter until nice and smooth. Pour it into your soufflé dish, and bake at 375 for about 30-minutes or until it begins to set.
Meanwhile, make the topping: In a small bowl, stir together coconut, flour, pecans, remaining 1/4 cup brown sugar and 3 tablespoons melted butter until it’s combined.
Remove soufflé from the oven and top it with the coconut pecan mixture. Return to oven and bake for another 30 minutes, or until golden brown. Let it cool 10-15 minutes and serve!