Sift the
flour, semolina, cocoa, and salt into a medium
bowl. Beat the butter and sugar in a large bowl
until creamy.
Add the egg,
beating until just blended. Mix in the dry
ingredients. Press the dough into a disk, wrap
in plastic wrap, and refrigerate for 30 minutes.
Preheat the
oven to 375°F/190°C/gas 5. Set out two cookie
sheets. Roll out the dough on a lightly floured
surface to a thickness of 1/4 inch (5 mm).
Use a 2-inch
(5-cm) cookie cutter to cut out the cookies.
Gather the dough scraps, re-roll, and continue
cutting out cookies until all the dough is used.
Use a spatula
to transfer the cookies to the cookie sheets.
Bake for 12-15 minutes, or until lightly
browned. Transfer to racks to cool.