Special equipment: an 8-inch square baking pan
Preheat the oven to 350 degrees F. Grease an 8-inch square baking pan.
In the bowl of a stand mixer fitted with the paddle attachment, combine the sugar, flour, baking soda, baking powder and salt. In a medium bowl, whisk the bourbon, vanilla and eggs. Add the egg mixture and butter to the mixer and beat until combined. Stir in the chocolate chips and walnuts, and then pour the mixture into the prepared pan.
Bake until the surface looks dry and the middle is no longer wet, 25 to 30 minutes.
Cool and cut the pie into squares to use as a mix-in or topping for store-bought or homemade ice cream and milkshakes.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.