In the bowl of a stand mixer fitted with the paddle attachment, beat butter and salt at medium speed until smooth, 1 to 2 minutes, scraping down sides of bowl as needed. With mixer at low speed, gradually add confectioners’ sugar, beating just until combined. Beat in amaretto and almond extract. Increase speed to medium; beat until fluffy, 1 to 2 minutes, scraping down sides of bowl as needed. Use immediately.
Recipe by Victoria at https://victoriamag.com/amaretto-peach-macarons-recipe/