01 -
In the bowl of a stand mixer fitted with a paddle attachment, combine unsalted butter, granulated sugar, and light brown sugar. Beat on medium-high speed for 2 to 3 minutes until light and creamy.
02 -
Add vanilla extract and eggs to the creamed mixture. Continue beating for 1 to 2 minutes, ensuring the mixture is smooth and fluffy.
03 -
In a separate mixing bowl, whisk together cake flour, cornstarch, baking soda, baking powder, and kosher salt. Gradually add the dry ingredients to the wet mixture. Beat on medium speed for 1 to 2 minutes, scraping down sides of the bowl as needed.
04 -
Cover the dough and refrigerate for 1 hour to allow the mixture to firm up for shaping.
05 -
Preheat oven to 350°F (177°C). Line two large baking sheets with parchment paper.
06 -
In a medium bowl, stir together softened unsalted butter, light brown sugar, cinnamon, and cake flour until completely smooth. Scoop heaping teaspoons (about 2 teaspoons) of filling, roll into balls, and place on a prepared tray.
07 -
Using a 1/4 cup measuring cup, scoop portions of chilled dough. Break each portion in half, creating a well in one half. Place a filling ball inside the well, top with the remaining dough half, and pinch seams to seal. Roll gently into a ball, ensuring filling is fully encased.
08 -
Space the cookie balls 2 inches apart on prepared baking sheets. Bake for 11 to 13 minutes, or until tops are set and edges turn light golden brown. Cool on baking sheet 5 minutes, then transfer to a wire rack to cool completely.
09 -
While cookies cool, whisk together powdered sugar, cinnamon, melted butter, and milk until smooth and glossy.
10 -
Place parchment paper under the rack. Spoon glaze over each cookie, allowing it to reach the edges. Let glaze set for 15 minutes before serving.