Beat Cream Cheese (240 gram), Unsalted Butter (55 gram), and Vegetable Shortening (60 gram) together in a stand mixer until light and fluffy.
Add in Powdered Confectioners Sugar (400 gram), Corn Starch (2 tablespoon), Vanilla Extract (1/2 teaspoon), and Salt (1/4 teaspoon). Mix on low speed until just combined.
Then, increase speed to medium until smooth. Put in the fridge for ten minutes to set.