Prep the pan: Lightly grease a 9-inch pie dish or line a removable-bottom tart pan. Set aside.
Make the crust: In a bowl, mix cookie crumbs, melted coconut oil or butter, and salt until the texture resembles wet sand.
If it looks too dry to hold together when pressed, add milk 1 teaspoon at a time.
Press and chill: Firmly press the crumb mixture into the bottom and up the sides of the pan. Use the bottom of a measuring cup to pack it tightly. Chill in the fridge for at least 20 minutes.
Beat the base: In a large bowl, beat the softened cream cheese until smooth.
Add Greek yogurt, vanilla, almond extract (if using), and salt. Mix until creamy with no lumps.
Add protein and sweetener: Sprinkle in the protein powder and powdered sweetener. Mix on low at first to avoid dust, then increase speed until fully combined and thick.
Taste and adjust sweetness.
Lighten the filling: Gently fold in the whipped topping until no streaks remain. The texture should be fluffy but not runny.
Stir in cookies: Fold in the crushed sandwich cookies, leaving some larger bits for texture.
Fill the crust: Spoon the mixture into the chilled crust. Smooth the top with a spatula.
Chill to set: Refrigerate for at least 4 hours, preferably overnight, until the pie is firm enough to slice cleanly.
Garnish and serve: Top with extra crushed cookies or shaved chocolate right before serving.
Slice with a warm, sharp knife for cleaner cuts.