Preheat the oven to 350°F and line both sheets with parchment paper.
In a saucepan over medium heat, melt the butter. Stir it frequently to prevent it from burning. Keep heating until the butter foams and darkens to a shade of amber, about 3-4 minutes. Then remove the butter from the heat and pour it into a small bowl. Place it in the fridge to cool for 10 minutes.
2 sticks unsalted butter
While the butter cools, whisk the flour, cream of tartar, baking soda and salt in a separate mixing bowl.
2½ cups all purpose flour, 2½ tsp cream of tartar, 1 tsp baking soda, ¼ tsp salt
In the bowl of a stand mixer, add the cooled butter, 1 cup of the granulated sugar and the brown sugar. Beat on medium until it's well combined.
1 cup granulated sugar, ½ cup packed brown sugar
Add the eggs, vanilla extract and bourbon to the wet ingredients. Beat on medium until the mixture becomes a pale yellow, about 2 minutes.
2 eggs, 1 ½ tsp vanilla extract, 2½ tbsp bourbon
Turn the speed to low and add the dry ingredients in 2-3 increments, beating until the batter is just combined. The batter will be pretty soft.
Pour the remaining granulated sugar into a separate small bowl with the cinnamon and allspice. Stir.
½ tsp all spice, ½ cup granulated sugar, 1 tbsp cinnamon
Make the cookies. With a spoon or cookie scoop, scoop out a hefty tablespoon of batter and roll it into a tight ball. Roll the cookie ball through the cinnamon sugar and make sure all sides are covered. Place the cookie on a baking sheet.
Repeat until you have about 8 cookies per sheet. You may have to bake your cookies in batches. Place the cookies in the oven for 8 minutes, until just set and a bit soft in the center. Let them cool for 10 minutes before moving them to a cooling rack. Enjoy!