In a large mixing bowl or stand mixer, cream the butter and sugar until pale and fluffy.
Beat in the egg and vanilla extract.
In a separate bowl, whisk together the flour, pumpkin spice, and salt. Gradually add to the wet ingredients and mix until a dough forms.
Shape the dough into a disc, wrap in cling film, and chill for at least 1 hour.
Preheat the oven to 175°C (350°F) and line two baking trays with parchment paper.
On a lightly floured surface, roll out the chilled dough to 0.5 cm (1/4 inch) thick. Cut out leaf shapes with cookie cutters and then press in the embosser to create the leaf design.
Place on the baking trays and bake for 8–10 minutes, until just turning golden at the edges. Cool completely on a wire rack.