In a large bowl, beat softened butter and cream cheese on medium-high speed until fluffy (around 2 minutes).
Add salt, almond extract, and vanilla. Mix until combined.
On low speed, gradually add powdered sugar, 1/2 cup at a time.
Once all the sugar is added, increase the speed to medium-high and whip until light and fluffy (around 2 minutes).
Spread icing over the cooled loaf in an even layer.