- vegetable oil cooking spray
- 3 cups mashed sweet potatoes
- 1 cup white sugar
- 3 large eggs
- 1/2 cup milk
- 1/2 cup melted butter
- 1 teaspoon vanilla extract
- 1/2 teaspoon ground cinnamon
- Topping:
- 1 cup firmly packed brown sugar
- 1 cup roughly chopped pecans
- 1/3 cup all-purpose flour
- 1/3 cup melted butter
- Preheat oven to 400 degrees F (200 degrees C). Lightly spray a 9×13-inch baking dish with vegetable oil.
- Beat sweet potatoes, white sugar, eggs, milk, 1/2 cup melted butter, vanilla extract, and cinnamon together in a bowl using an electric mixer until smooth; pour into the prepared baking dish.
- Mix brown sugar, pecans, flour, and 1/3 cup melted butter together in a bowl; spread over sweet potato mixture.
- Bake in the preheated oven until souffle is set in the middle, 25 to 30 minutes.