Make sure that you leave the Butter and Cream Cheese called for in this recipe, out on the counter until it is soft. The Frosting will not mix correctly if the Butter and Cream Cheese are cold, both need to be soft, and at room temperature. ALSO: Using the Blender to whip the cream is really a great way to whip the cream to a thick consistency. I used the Ninja Blender/Food Processor, and it was done in no time. I checked it after a few seconds and kept checking it until it was thick and creamy.