Fashioned Sweet Potato Pie

1/2 c Butter, softened

1/2 c Packed brown sugar

1 c Mashed,cooked sweet potatoes

3 Eggs,lightly beaten

1/3 c Corn syrup

1/3 c Milk

1/2 t Salt

1 t Vanilla extract

1 Unbaked pie shell

Cream butter and brown sugar in bowl until light and fluffy.Blend in sweet potato and eggs.Add next 4 ingredients;mix well.Pour into pie shell.Bake in a 425 degree oven for 10 minutes.Reduce heat to 325 degrees and bake 35 to 45 minutes longer or until well set.