For Crust: Add all crust ingredients to food processor. Pulse until mixture holds together and pulls away from sides, about one minute. Flour a large surface and roll out about ¼ inch thick. Place into pie dish and cut away excess edges. Place a circle of foil or parchment inside and fill with pie weights or dried beans. This step is CRUCIAL when you are blind baking (baking without a filling) as your pie crust will shrink down into nothing otherwise!
For Maple Pie: Bring cream, maple syrup, brown sugar and vanilla bean to a boil over medium heat.
Mix together cornstarch and water until dissolved. Add to maple mixture, whisking CONSTANTLY. Continue whisking until mixture thickens, about 2 minutes. Remove from heat. Stir in vanilla extract (if using) and butter. Allow to cool 10 minutes before pouring into pie crust.
Refrigerate overnight to allow pie to set.
Serve with vanilla ice cream or whipped cream, if desired.