Bake the Crust: First, prepare your keto pie crust as directed and bake it at 325°F for about 18-20 minutes until it's perfectly golden. Let it cool completely.
Whip the Cream Cheese: In a spacious bowl, beat the softened cream cheese until it's incredibly smooth and creamy. Then, mix in 6 tablespoons of powdered sweetener, the sour cream, and vanilla extract until everything is perfectly combined.
Make Whipped Cream: In a separate bowl, whip the heavy cream with the remaining 2 tablespoons of powdered sweetener until it forms lovely stiff peaks.
Fold It In: Set aside about a quarter of the whipped cream for later decoration. Gently fold the rest into your cream cheese mixture until no streaks are left. This creates a wonderfully light filling!
Chill the Filling: Spoon this creamy mixture into your cooled pie crust and spread it evenly to the edges. Pop it into the refrigerator for 1 hour to let it firm up nicely.
Cook the Raspberry Topping: While the pie chills, combine raspberries, granular sweetener, and water in a medium saucepan. Bring it to a gentle simmer and cook for about 7 minutes, mashing the berries as they soften. Remove from heat.
Add Gelatin: Quickly sprinkle the gelatin over the warm berry mixture and whisk it briskly until fully dissolved and combined.
Layer and Chill Again: Carefully spread this vibrant raspberry topping over your chilled cream cheese filling. Return the pie to the refrigerator for another hour to set completely.
Garnish and Serve: Just before serving, use the reserved whipped cream to pipe a beautiful border around the pie's edge. Add a few extra fresh raspberries for a final flourish!