Begin by softening your cream cheese at room temperature for 30 minutes until completely smooth. Room temperature cream cheese prevents lumps and ensures silky texture throughout the entire filling mixture.
Combine softened cream cheese with pumpkin puree in a large mixing bowl. Beat on medium speed until fully blended and uniform in appearance, about 2-3 minutes total.
Add granulated sugar, vanilla extract, pumpkin pie spice, and salt to the pumpkin mixture. Mix thoroughly until every ingredient incorporates completely, roughly 1 additional minute of beating time.
In a separate bowl, whip heavy cream with powdered sugar and vanilla until stiff peaks form. This should take 3-4 minutes maximum to avoid over-whipping. Gently fold whipped cream into the pumpkin filling using a rubber spatula with careful, deliberate motions.
Pour the no bake pumpkin pie recipe filling into your prepared graham cracker crust, spreading evenly. Refrigerate for at least 4 hours or preferably overnight until completely set and chilled.
Top with additional whipped cream and cinnamon garnish immediately before serving. The cozy pumpkin pie tastes best when served cold directly from the refrigerator.