This classic dough produces cookies with a remarkably delicate texture -- they crumble the minute they're in your mouth. Use this dough to make Orange Ginger Rounds or Orange Sable Cookies.
Place almonds and sugar in the bowl of a food processor. Process until the mixture resembles coarse cornmeal, and set aside.
Place butter and zest in the bowl of an electric mixer fitted with paddle attachment. Beat on medium speed until white and fluffy, 2 to 3 minutes. On low speed, add the almond mixture, and beat until combined, 10 to 15 seconds. Add egg and lemon juice, and combine. Add flour, and beat until combined.