Step 2
In a large mixing bowl, beat the softened cream cheese on medium-high speed of mixer fitted with the paddle attachment until the cream cheese is light and fluffy. Scrape down the side of the bowl and add the lemon pie filling and lemon zest. Beat on medium-high speed until all ingredients are well combined, stopping to scrape down the side and bottom of bowl as needed. Slowly add the remaining 1/2 cup icing sugar and mix until incorporated.