-
Lower your oven temperature to 350°F (175°C). Grease a 9×13 inch or a similar 3-quart baking dish.
-
To the bowl of mashed sweet potatoes, add the granulated sugar, brown sugar, beaten eggs, melted butter, milk, vanilla extract, cinnamon, nutmeg, and salt.
-
Pour the filling into the prepared baking dish and spread it into an even layer.
Step 3: Create the Pecan Streusel Topping
-
In a separate medium bowl, combine the brown sugar, flour, chopped pecans, and the optional ½ teaspoon of cinnamon.
-
Add the cold, cubed butter. Using a pastry cutter, your fingers, or a fork, work the butter into the dry ingredients until the mixture is crumbly and the butter is about the size of peas.
Step 4: Assemble and Bake
-
Sprinkle the pecan streusel topping evenly over the entire surface of the sweet potato filling.
-
Place the dish in the preheated 350°F (175°C) oven and bake for 40-50 minutes, or until the filling is set (it shouldn’t jiggle much in the center) and the streusel topping is golden brown and bubbly.
