Creating Chocolate Chip Cookie Sandwiches is easy when you follow these simple steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Line baking sheets with parchment paper.
2. Mix Dry Ingredients: In a bowl, whisk together the flour, baking soda, and salt. Set aside.
3. Cream Butter and Sugars: In a large mixing bowl, cream together the softened butter, granulated sugar, brown sugar, and vanilla extract until fluffy.
4. Add Eggs: Beat in the eggs one at a time, ensuring each is well incorporated.
5. Combine Mixtures: Gradually add the dry ingredients to the wet mixture, mixing until just combined.
6. Fold in Chocolate Chips: Gently fold in the chocolate chips until evenly distributed.
7. Scoop Cookies: Using a cookie scoop or tablespoon, drop rounded balls of dough onto the prepared baking sheets, spacing them about 2 inches apart.
8. Bake: Bake in the preheated oven for 10–12 minutes, or until the edges are golden brown but the centers are still soft.
9. Cool: Remove from the oven and let the cookies cool on the baking sheets for 5 minutes before transferring them to wire racks to cool completely.
10. Prepare the Filling: In a mixing bowl, beat together the softened butter, powdered sugar, vanilla extract, and enough milk to achieve a smooth, spreadable consistency.
11. Assemble Sandwiches: Take one cookie, spread a generous amount of filling on the bottom, and top with another cookie. Press gently to create a sandwich.
12. Repeat: Continue assembling until all cookies are filled.

With these simple steps, you can create these incredible Chocolate Chip Cookie Sandwiches that everyone will love!