Add the butter to a pot and heat it over medium heat. Allow the butter to melt and come to a simmer. Simmer until the butter is foamy, giving off a nutty scent and has browned. The whole process should take about 5-8 minutes. Remove the butter from the heat and transfer it to a small bowl. Pop it in the fridge and allow it to cool completely until it is solid but still malleable.
1 ¼ cups (280 g) unsalted butter
Preheat the oven to 350 degrees. Line two baking sheets with parchment paper and set aside.
In a medium bowl, whisk together the flour, cinnamon, ginger, allspice, nutmeg, cardamom, cloves, baking soda, baking powder and salt. Then set aside the flour mixture.
2 cups (250 g) all purpose flour, spooned and leveled, 1 tablespoon ground cinnamon, 1 ½ teaspoon ground ginger, ½ teaspoon ground allspice, ½ teaspoon ground nutmeg, 1 teaspoon ground cardamom, ¼ teaspoon ground cloves, ½ teaspoon baking powder, ½ teaspoon baking soda, ½ teaspoon salt
In a large bowl whip the cooled brown butter with an electric mixer on high speed until it is fluffy, about 1 minute. Then add in the brown sugar and mix on high speed until creamed together, about 2 minutes. (You can also use the bowl of a stand mixer fit with a paddle attachment.)
1 ¼ cups (275 g) light brown sugar
Add in the egg yolks and vanilla and mix for one minute on medium speed until pale and fluffy. Scrape the sides of the bowl as necessary.
4 egg yolks, at room temprature, 2 teaspoon vanilla
Add the dry ingredients to the wet ingredients and combine on low speed.
Scoop the dough into 22 portions with a 2 tablespoon cookie scoop, then roll into balls. Roll the cookie dough balls in the spiced sugar mixture.
Transfer the cookie dough to a parchment paper lined baking sheet. Bake 8 cookies at a time, for 11- 12 minutes.
Let the cookies cool for 5 minutes on the cookie sheet, then transfer the baked cookies to a wire rack to cool completely. Then serve!