To Make the Cookies:

• Preheat oven to 325 degrees.
• Butter or grease a baking sheet and set aside.
• Combine the softened butter and sugar in a bowl. Mix until combined.
• Add eggs, salt, flour, cocoa powder, and baking soda. Mix until combined.
• Use a cookie cutter or small jar cap to cut round cookie shapes. If you have an Oreo on hand, use that.
• If you have an Oreo on hand, use that to press the cookie design into each dough shape.
• Bake for 10-15 minutes and let cool completely.

To Make the Filling:

• Combine the butter, powdered sugar, and vanilla in a bowl. Mix until combined.
• Scoop the filling onto a cookie and spread evenly. Add another cookie to make a sandwich. Enjoy!