Combine graham cracker crumbs and melted butter in a bowl, then press into the bottom of an 8" or 9" springform pan. Chill for 30 minutes, or bake for 5 minutes at 350°F if in a hurry.
In a large bowl, beat the cream cheese, pistachio pudding mix, powdered sugar, and almond extract until smooth and well blended.
In a separate bowl, whip the heavy cream until stiff peaks form, about 3-4 minutes.
Gently fold the whipped cream into the cream cheese mixture, ensuring it stays airy.
Spread the filling evenly over the crust and refrigerate for at least 6 hours, preferably overnight, before serving.
Notes
Nutrition Information (per serving): Calories: 688 Total Carbs: 32g Net Carbs: 31g Fats: 60g Protein: 8g