Ultimate Easy Bake Duplex Crème Cookies: Chocolatey Delight Awaits!

Instructions:

1. In a large mixing bowl, beat the softened butter, granulated sugar, and brown sugar until light and fluffy.
2. Add eggs, one at a time, mixing well after each addition. Stir in vanilla extract.
3. In a separate bowl, whisk together flour, cocoa powder, baking soda, and salt.
4. Gradually add dry ingredients to the wet mixture, mixing until a dough forms.
5. Divide the dough in half, flatten into disks, wrap in plastic wrap, and chill for 30 minutes.
6. Preheat the oven to 350°F (175°C). Line baking sheets with parchment paper.
7. Roll out the chilled dough on a floured surface (or use a cookie cutter for uniform shapes).
8. Cut out cookies and place them on prepared baking sheets. Bake for 12-15 minutes until set (but soft).
9. Let cool on the sheet for a few minutes before transferring to a wire rack.
10. In a bowl, combine powdered sugar, softened butter, vanilla extract, and milk. Blend until smooth and creamy.
11. Once cookies are completely cool, spread a generous amount of filling on the flat side of one cookie and sandwich with another cookie.