In a medium bowl, use a hand mixer to cream together the cream cheese and butter until smooth.
Add the vanilla extract and powdered sugar. Mix well.
Add in the cream, 1 tablespoon at a time, until you’ve reached the desired consistency.
For the Cake
Preheat the oven to 350 degrees.
Cream together the shortening and sugar.
Add eggs and mix well.
Add the vanilla extract, cocoa and red color and mix again.
Add the buttermilk, salt and flour. Mix well.
Lastly, add the vinegar and baking soda and mix until the batter is smooth.
Spray an 11x17x1” sheet cake pan with cooking spray.
Spread the batter evenly in the pan.
Bake the cakes for 15 minutes or until the center of the cake bounces back when you touch it.
Allow the cakes to cool completely and then frost.
The calories shown are based on the cake being cut into 15 pieces and using all of the frosting, with 1 serving being 1 slice of frosted cake. Since different brands of ingredients have different nutritional information, the calories shown are just an estimate. Also, if you use less frosting, the serving will be less calories.