Chill a metal mixing bowl and beaters in the freezer for 10 minutes.
Beat the cold cream on medium speed until slightly thickened and foamy.
Sprinkle in confectioners’ sugar, pumpkin pie spice, salt, and cream of tartar. Whip to soft peaks.
Add pumpkin puree and vanilla. Whip just to medium peaks, keeping the mixture light and airy.
Taste and adjust spice or sweetness. Serve right away or refrigerate up to 24 hours.