Preheat oven to 150ºC. Sift together the flours to combine. In a separate large mixing bowl, cream butter and sugar together until light and fluffy. Stir through half the flour mix, then use your hands to add the second half and the salt, as the mixture will become quite stiff. Turn out onto a lightly floured surface and knead very gently until completely combined.
Usinga a rolling pin, roll out the dough onto a flat surface to about 0.5cm thickness. Cut out the biscuit shapes and place them on a lined baking tray. Press lavender flowers onto the top of each cookie.
Bake for 30 minutes on the lowest oven shelf, until just pale golden. Let the biscuits stand on the tray for 10 mins before removing and placng them on a wire rack.
