2cupsmashed cooked sweet potatoesweight of 15 oz after mashing and cooking
2largeeggsseparated
½cupsalted butter (or unsalted plus an extra ⅜ tsp salt)
1cupfirmly packed brown sugar plus 1 teaspoon molasses
¼teaspoonsalt
½teaspoonground cinnamon
½teaspoonground nutmeg (or use half nutmeg and half mace)
½teaspoonground ginger
½cupwhole milk
¼cupgranulated sugar
19-inchunbaked deep dish pastry shell
Instructions
Preheat oven to 400°. Set a rimmed baking sheet in the oven to preheat along with the oven.
Combine sweet potatoes, melted butter, brown sugar, egg yolks, salt, and spices. Stir in milk, and mix well with a heavy duty scraper or you can use a mixer on low speed.
In a clean bowl, beat egg whites at high speed of an electric mixer for 1 minute. Gradually add the ¼ cup sugar, beating until stiff peaks just start to form. Don't beat until dry.
Fold egg whites into sweet potato mixture, then spoon into an unbaked pastry shell.
Remove the hot baking sheet from the oven and set the unbaked pie on it. Bake at 400° for 10 minutes, then reduce heat to 350°F and bake for an additional 45 minutes or until set. Let cool completely. Store in the refrigerator.