Preheat the oven to 350 degrees F and line a baking sheet with parchment paper. Set aside.
In a large bowl with a hand mixer or a bowl of a stand mixer with paddle attachment, cream the butter and sugars until creamy and smooth, about 2-4 minutes on medium speed.
170 grams unsalted butter, softened, 110 grams dark brown sugar, 100 grams granulated sugar
On medium speed, beat in the egg, vanilla, molasses and sourdough discard until fully incorporated.
80 grams dark molasses, 1 large egg yolk, 8 grams vanilla extract, 100 grams sourdough discard
In a separate bowl, whisk together the flour, baking soda and spices. Mix the dry ingredients into the wet ingredients on low speed. When there is just a few streaks of flour left, continue to fold the batter with a rubber spatula until just combined. Be careful not to overmix the batter.
255 grams all-purpose flour, 12 grams baking soda, 4 grams ground cinnamon, 3 grams ground ginger, 1 gram ground cloves, 1 gram ground nutmeg, 3 grams fine sea salt
Cover the cookie dough in plastic wrap and chill for at least 2 hours. Or you can long-ferment the dough in the fridge for up to 3 days.
When ready to bake, use a cookie scoop to scoop the cookie dough, about 35 grams each into (1 Tablespoon), and roll them into a smooth dough ball, then generously roll them into the sugar. Place 6 cookies on the prepared baking sheet about 2 inches apart. You will have to bake the cookies in batches. Place the dough back into the fridge in between baking to keep the dough chilled. 50 grams sugar *for rolling
Bake the cookies at 350 degrees F for 11-12 minutes or until the edges are just crisp and the center is still soft. Tap the cookies on the counter to help create the beautiful cracked finish. Do not overbake these cookies.BAKING TIP: To create a perfectly round cookie shape, use the backs of two spoons to shape the cookies. Make sure to do this immediately out of the oven while the cookies are still warm! Leave on the baking sheet for 5 minutes before cooling completely on a wire rack and enjoy!