Preheat the
oven to 375°F/190°C/gas 5. Set out a cookie
sheet. Sift the flour, baking powder, and salt
into a medium bowl.
Stir in the
aniseeds. Beat the butter and sugar in a large
bowl with an electric mixer at high speed until
creamy.
Add the lemon
zest and eggs, beating until just blended. Mix
in the dry ingredients to form a stiff dough.
Divide the
dough in half. Form the dough into two 11-inch
(28-cm) logs and place 3 inches (8 cm) apart on
the cookie sheet.
Bake for
25-35 minutes, or until firm to the touch.
Transfer to a cutting board to cool for 15
minutes. Cut on the diagonal into 1-inch
(2.5-cm) slices.
Arrange the
slices cut-side up on two cookie sheets and bake
for 5-7 minutes more, or until golden and
toasted. Transfer to racks to cool.