In a mixer, beat softened butter and cream cheese on medium-high speed until fluffy (about 2 minutes).
Add salt, almond extract, and vanilla. Mix until combined.
On low speed, gradually add powdered sugar, ½ cup at a time.
Once all the sugar is added, increase speed to medium-high and whip until light and fluffy (about 2 minutes).
Spread the icing over the cooled cake in an even layer. Use as much or as little as you like.