01 -
Combine softened butter, brown sugar, and cinnamon until smooth. Shape the mixture into small balls and freeze for 20 minutes.
02 -
Preheat the oven to 350°F. Line baking sheets with parchment paper.
03 -
In a large bowl, beat the softened butter until creamy. Add granulated sugar, eggs, and vanilla extract; mix until the mixture is light and fluffy.
04 -
Gradually add flour, baking soda, kosher salt, and cream of tartar to the wet mixture. Stir gently until just combined to avoid overmixing.
05 -
Gently fold the frozen cinnamon filling balls into the dough ensuring even distribution.
06 -
Using a cookie scoop, form dough into balls. Roll each ball in a sugar and cinnamon blend to coat thoroughly.
07 -
Place the coated dough balls onto prepared baking sheets and bake for 11 to 12 minutes until edges are set but not browned.
08 -
Transfer cookies onto wire racks and allow them to cool completely before serving.