Add flour, sugar, and salt to a food processor. Pulse 2-3 times to combine. Add cold cubed butter and continue to pulse 7-8 times until crumbly. Slowly pour in ice cold water and continue to pulse until a dough ball forms.

Transfer dough to a sheet of plastic wrap. Form into a ball and press into a flat disc. Wrap in plastic and chill in the refrigerator for at least 30 minutes.

Remove the disc from the fridge and lightly flour a clean surface. Place the disc on top and sprinkle again with more flour. Lay wax paper on top of the disc and roll out to a 12-inch circle. Transfer dough to a 10-inch pie plate, lightly pressing into the dish. Trim off excess dough and crimp edges, if desired. Prick the base of the crust a few times with a fork and place in the freezer for about 5 minutes.

Preheat oven to 400°F. Place the potatoes in a large pot and cover with cold water. Bring to a boil and cook until fork tender, about 20 minutes. Drain, spread out on a flat surface and allow to dry completely.

Add cooked sweet potatoes and remaining ingredients to a food processor (stand mixer or whisk/bowl would also work) and process until smooth, about 10 seconds. Pour pie filling into prepared pie crust and smooth out the top.

Bake at 400°F for 15 minutes and then reduce the oven temperature to 350°F and continue baking for 35-40 more minutes. The center will still be slightly jiggly and the edges will be set.

Allow the pie to cool completely on a cooling rack, about 1 hour. Enjoy after it cools, or for best results, transfer to the refrigerator and chill for at least 4 hours.