Mom always cooked a sweet potato pie during the holidays, so whenever I cook one, it always brings back fond memories. Simple yet full flavored. I don't count the process of cooking the potatoes as part of the prep time because you can bake them anytime before hand and store them for later use.
Prepare potatoes according to preference. Some cooks boil their potatoes, I prefer to bake them,I believe it draws out and enhances the potato's natural sugar giving the pie a much better flavor. Plus it easier to peel because the potato separates from the skin during baking.
Once potatoes are cooked, peel and mash. I've found these wonderful beauties can be stringy,to elevate that, I run my hand held mixer through it a few times. The strings wrap around the blades and I rinse them down the drain. You'll have a smoother filling for sure.
Add condensed milk, spices, extract, and eggs and mix well.
Prepare your crust by mixing flour, butter, sugar, and cinnamon together.
Press into 9 inch pie pan.
Pour pie filling in and bake in preheated oven at 350' for 1 hour.