In the bowl of a stand mixer fitted with the paddle attachment, beat butter, salt, and almond extract at medium speed until creamy, 2 to 3 minutes, stopping to scrape sides of bowl. With mixer on low speed, gradually add confectioners’ sugar and cherry concentrate, beating until well combined and stopping to scrape sides of bowl. Increase speed to medium, and beat until smooth and fluffy, about 1 minute, Use immediately.