Place the butter in a medium-size mixing bowl, and blend with an electric mixer on low speed until smooth, about 1 minute.
Add the salt and about 1 cup of the sugar, and blend on low until coarse crumbs form.
Add the vanilla and almond extract, if using, along with 1 tablespoon of the cream, blending on low.
Add ½ cup of the sugar and another tablespoon of cream, and blend on low until smooth.
Add the final ½ cup sugar and the last tablespoon cream.
When smooth, increase the mixer speed to medium-high and blend for 30 seconds to lighten the frosting.
Frost your favorite cake, or store, covered, in the refrigerator for up to 2 days.