In a bowl, mix the softened butter, brown sugar, and cinnamon until wellcombined.
On a baking sheet lined with parchment paper, make small portions or chipsof the filling using a teaspoon.
Place the baking sheet in the refrigerator to harden the filling.
2. Prepare the cookie dough:
In a large bowl, beat the softened butter with the brown sugar and granulatedsugar until creamy.
Add the eggs and vanilla extract, beating until well combined.
In another bowl, mix the flour, salt, baking soda, and cream of tartar.
Gradually add the dry ingredients to the butter and sugar mixture, mixing untilno lumps remain.
Incorporate the chilled filling chips into the dough.
3. Chill the dough:
Refrigerate the dough for at least 2 hours or overnight to allow it to firm upand the flavors to meld.
4. Prepare the rolling mixture:
In a small bowl, combine the granulated sugar and cinnamon.
5. Shape and bake the cookies:
Preheat the oven to 350°F (180°C).
Form dough balls using approximately 4 tablespoons of dough each.
Roll each dough ball in the cinnamon-sugar mixture until fully coated.
Place the dough balls on a baking sheet lined with parchment paper, leavingspace between them to allow for spreading.
Bake for 10-12 minutes, or until the edges are lightly golden.
6. Prepare the icing:
In a small bowl, mix the powdered sugar, milk, and vanilla extract until smoothand well combined.
Drizzle the icing over the cooled cookies.
Notes
Chill the Dough: It is crucial to refrigerate the dough for at least 2 hours or overnight. This helps the cookies maintain their shape and enhances the flavor development.
Chill the Filling: Ensure the filling chips are completely cold and solid before mixing them into the dough. This prevents them from melting too quickly during baking.
Accurate Flour Measurement: Measure the flour correctly to avoid dry and dense cookies. Use a spoon to fill the measuring cup with flour and level it off with a knife. Do not scoop the flour directly from the container with the measuring cup.
Ingredient Temperature: Make sure the butter and eggs are at room temperature before starting. This allows for more even mixing, creating a smoother dough.
Dough Ball Size: Use a cookie scoop or a standard measure to form dough balls of the same size. This ensures that the cookies bake evenly.
Avoid Overmixing: Mix the ingredients only until combined. Overmixing can make the cookies tough.
Perfect Baking: For softer and chewier cookies, bake until the edges are just golden and the centers still look a bit soft. The cookies will continue to cook slightly after being removed from the oven.
Icing: Apply the icing once the cookies are completely cool to prevent it from melting and spreading too much.
Storage: Store the cookies in an airtight container at room temperature to keep them fresh. If you live in a very warm climate, you can store them in the refrigerator and bring them to room temperature before serving.
Variations: Try adding chopped nuts to the filling for an extra crunch. You can experiment with different types of sugar in the filling, such as turbinado sugar, for a different texture.
Freezing: You can freeze the dough balls before baking. Simply form the balls, place them on a baking sheet, freeze until solid, and then transfer them to a freezer bag. When ready to bake, place them directly in the oven and add a couple of minutes to the baking time.
Shaping the Cookies: Once baked, the cookies may spread on the baking sheet. While they are still hot, use a spoon or a cylindrical object (such as a glass) to reshape and round the edges for a more uniform appearance.