Preheat the oven to 350 degrees F.
Bake the sweet potatoes: Line a small baking pan with parchment paper. Use a fork to poke holes in your sweet potatoes, then place on the baking sheet and bake for 1 hour or until sweet potatoes are very fork tender. Set sweet potatoes aside until cool enough to handle. Keep heat in the oven. Note: If you’d like, you can also do this step ahead of time and store your sweet potatoes in the fridge for a few days until you are ready to make the filling.
Prepare pie crust: Make pie crust as directed. Feel free to use my recipe, your favorite, or a store bought crust. Blind bake pie crust for 10 minutes, this isn’t necessary but I do recommend. To blind bake your pie crust (which simply means baking it a little bit before the filling goes in), simply place parchment paper over pie crust and fill with dried beans/rice or dried rice and bake for 10 minutes. Remove parchment paper with dried beans/rice or pie weights and bake crust for 5 more minutes. Once done baking, set pie crust aside.
Make the filling: add the mashed sweet potato (make sure to measure out and remove the skin!), pure maple syrup, almond milk to the bowl of an electric mixer, or alternatively to a blender or food processor. Blend/mix ingredients together on high until well combined and no large lumps of sweet potato remain. Transfer mixture to a large bowl. Whisk in the eggs, bourbon, vanilla, cinnamon, nutmeg, allspice and salt until well combined and smooth. Pour into the pie crust.
Bake for 45-60 minutes until filling is no longer jiggly in the middle. Check the pie after every 20 minutes to make sure the crust isn't burning. If it is getting a little too golden brown, simply cover pie edges with foil or a pie shield. Allow the pie to cool for at least an hour or two before serving.
Serve. Before serving, sprinkle with Maldon salt for that sweet and salty flavor, then cut into 9 slices. Serve with whipped cream, vanilla bean ice cream or a pecan butter ice cream. Pie should be kept in the fridge once completely cool. Store pie in the fridge. Serves 9.