In a stand mixer fitted with a paddle attachment, beat the butter and Biscoff spread on medium-high speed for about two minutes.
With the mixer on low speed, slowly add the sifted powdered sugar until incorporated. Scrape down the sides of the bowl and continue to mix for another minute.
Add the vanilla, cream ,and salt and increase the speed to medium-high and beat the frosting for 3 to 5 minutes, until light in color and texture.