Preheat your oven to 350°F (175°C).
In a mixing bowl, combine graham cracker crumbs, granulated sugar, and melted butter until evenly mixed.
Press the graham cracker mixture into the bottom and up the sides of a 9-inch pie pan, creating an even layer.
Bake the crust for 8-10 minutes until lightly golden, then allow it to cool completely.
In a saucepan over medium heat, combine peanut butter, heavy cream, light brown sugar, corn syrup, and vanilla extract, stirring until smooth.
Once the mixture is combined, pour it over the cooled crust, smoothing it out with a spatula.
Sprinkle chopped salted peanuts over the top of the filling, pressing them in gently to adhere.
Refrigerate the pie for at least 4 hours, or overnight, to set.
Before serving, whip remaining heavy cream until soft peaks form, then spread or pipe atop the pie as a garnish.
Finish with a light sprinkle of sea salt to enhance flavors and serve.