Mom's sweet potato pies are a vital part of my family's Thanksgiving. This is a recipe she inherited from her mother. The blender incorporates ingredients so well that this makes a creamy pie beyond belief. Mom prefers her sweet potato pie without any spices at all, but I usually add pinch or two of the spices listed below. Also, in lieu of the glaze, we opt for a creamy refrigerated whipped topping, but I've included glaze directions as an option.