Add lemon juice to taste, plus sugar, a pinch of salt, and one grind of black pepper. Refrigerate. Shortbread: Place the butter and confectioner’s sugar in a standing mixer and beat until creamy.

Savor the irresistible Argentinian Alfajores—a harmony of delicate shortbread, luscious dulce de leche or lemon meyer curd, and a dusting of powdered sugar. These cookies promise a melt-in-your ...