Preheat your oven to 350°F (175°C).
In a medium bowl, mix the almond flour, half of the melted butter, and one egg. This will serve as your crust. Press the mixture into a 9-inch (23 cm) pie dish and bake for 10 minutes.
While the crust is baking, blend the pumpkin puree, cream cheese, remaining butter, remaining egg, vanilla extract, spices, sweetener, and protein powder until smooth.
Once the crust is ready, pour the mixture over it. Return the pie to the oven and bake for 45 minutes.
Let the pie cool before slicing.