-
Preheat the oven
to 350°F/180°C/gas
4.
Butter three cookie sheets. Sift the flour and
cornstarch into a medium bowl.
-
Beat the butter and
confectioners' sugar in a large bowl with an
electric mixer at high speed until creamy.
-
Add the
egg, beating until just blended. Stir in the vanilla
and lemon extracts. Continue beating until pale and
fluffy.
-
Mix in the dry ingredients. Divide the
dough evenly between two bowls. Mix the cocoa and
oil in a small bowl. Stir the cocoa mixture into one
bowl of the dough.
-
Fit a pastry bag with a 1/4-inch
(5-mm) star tip. Fill the pastry bag with the plain
batter, twist the opening tightly closed.
-
Pipe
out small rings, hearts, circles, and swirls spacing
1 1/2 inches (4 cm) apart on the prepared cookie
sheets. Repeat with the chocolate batter.
-
Bake,
one sheet at a time, for 10-15 minutes, or until the
plain cookies are golden brown. Cool the cookies
on the cookie sheets for 2 minutes.
-
Transfer to
racks to cool. Dust some of the dark cookies with
the confectioners' sugar.