These cookies are incredibly soft, and taste like cinnamon sugar mini doughnuts. My coworkers have taken to calling them “crack cookies”.
2 cups all-purpose flour
1 teaspoon baking soda
1 and 1/2 teaspoons cornstarch
1/2 teaspoon ground cinnamon (use 1 teaspoon if you love cinnamon)
1/4 teaspoon salt
3/4 cup unsalted butter, melted
1 and 1/4 cups dark brown sugar (light brown is OK)
1 large egg, room temperature
2 teaspoons vanilla extract
1/3 cup granulated sugar, for rolling
Toss together the flour, baking soda, cornstarch, cinnamon, and salt in a large bowl. Set aside.
In a medium size bowl, whisk the melted butter and brown sugar together until no brown sugar lumps remain. Whisk in the egg. Finally, whisk in the vanilla. Pour the wet ingredients into the dry ingredients and mix together with a large spoon or rubber spatula. The dough will be very soft, yet thick. Cover the dough and chill for 2 hours, or up to 3 days. Chilling is mandatory.
Take the dough out of the refrigerator and allow to slightly soften at room temperature for 10 minutes if you had it chilling for more than 2 hours.
Preheat the oven to 325 F. Line two large baking sheets with parchment paper or silicone baking mats. Set aside.
Pour the granulated sugar into a bowl. Take 2 Tablespoons of dough and roll into a ball, then roll into the sugar. Bake for 8-9 minutes. Remove from the oven and lightly press the top of the cookie down with the back of a utensil or even use your fingers. You're trying to obtain a crinkly top. Place back into the oven for 1-2 more minutes. Cookies will be puffy and still appear very soft in the middle. That's ok. Remove from the oven and allow to cool on the baking sheet for ten minutes before transferring to a wire rack to cool completely.