Press piecrust into bottom and up sides of a 9-inch pie plate. Fold crust edges under, and crimp as desired.
In a large bowl, beat sweet potato, 1 cup toffee bits, condensed milk, ¼ cup melted butter, eggs, vanilla, cinnamon, nutmeg, and salt with a mixer at medium speed until combined. Pour filling into prepared crust. Cover loosely with foil.
Bake for 40 minutes.
In a medium bowl, stir together brown sugar, flour, remaining 1½ cups toffee bits, and remaining ¼ cup melted butter until well combined. Gently sprinkle onto pie. Bake, uncovered, 20 minutes more. Let cool completely on a wire rack. Refrigerate in an airtight container for up to 3 days.
Recipe by Paula Deen Magazine at https://pauladeenmagazine.com/sweet-potato-toffee-pie-recipe/