In a stand mixer fitted with a paddle attachment, beat the butter for 1 minute on medium speed until completely smooth and creamy.
145 g unsalted butter
Add the brown sugar and treacle, and beat on medium-high speed until combined and creamy looking. Scrape down the sides and bottom of the bowl as needed.
150 g dark brown sugar, 200 g dark treacle
Next, beat in egg and vanilla on high speed for 2 full minutes. Scrape down the sides and bottom ofthe bowl as needed.
1 large egg(s), 1 tsp pure vanilla extract
In a separate bowl, whisk the flour, baking soda, salt, ginger, cinnamon, allspice, and cloves together until combined.
437 g all-purpose flour, 1 tsp baking soda, ½ tsp salt, 1 Tbsp ground ginger, 1 Tbsp ground cinnamon, ½ tsp ground allspice, ½ tsp ground cloves
On low speed, slowly mix the dry ingredients into the wet ingredients until combined. The cookie dough will be quite thick and slightly sticky.
Divide dough in half and place each onto a large piece of plastic wrap. Wrap each up tightly and pat down to create a disc shape. Chill discs for at least 3 hours and up to 3 days.