In the bowl of a stand mixer fitted with the whisk attachment, whisk the heavy cream on medium-high until stiff peaks form. The whipped cream should be stiff, but don’t whisk too long or it will turn to butter. Carefully transfer the whipped cream to a separate bowl and set aside.
1⅛ cups heavy whipping cream
Remove the whisk attachment on the mixer and replace it with the paddle attachment. In the same bowl, place the cream cheese, granulated sugar, and powdered sugar and beat on medium speed until creamy and completely incorporated, about 3 minutes.
24 ounces full-fat cream cheese, 6 tablespoons granulated sugar, 2 tablespoons powdered sugar
Add the sour cream, lemon juice, and vanilla. Beat an additional 2 minutes until the mixture is very smooth.
¼ cup sour cream, ½ lemon, 1 teaspoon pure vanilla extract
Set the mixer on the lowest speed and add the whipped cream. Mix 10 seconds then use a rubber spatula to finish folding-in the whipped cream by hand.