Making Red Velvet Cookie Sandwiches is simple when you follow these steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper.
2. Mix Dry Ingredients: In a medium bowl, whisk together the flour, cocoa powder, baking soda, and salt.
3. Cream Butter and Sugars: In a large bowl, beat the softened butter, granulated sugar, and brown sugar until light and fluffy.
4. Add Egg and Flavorings: Beat in the egg, red food coloring, and vanilla extract until well combined.
5. Combine Mixtures: Gradually add the dry ingredients to the wet mixture, mixing until just combined.
6. Scoop Dough: Use a cookie scoop or tablespoon to drop dough onto the prepared baking sheet, spacing them about 2 inches apart.
7. Bake: Bake for 12-15 minutes, or until the edges are set. The centers may look slightly underbaked; this is okay.
8. Cool Cookies: Remove from the oven and let them cool on the baking sheet for about 10 minutes before transferring to a wire rack to cool completely.
9. Prepare Filling: In a separate bowl, combine the softened cream cheese, powdered sugar, and vanilla extract. Beat until smooth and creamy.
10. Assemble Sandwiches: Once the cookies are completely cool, spread a generous amount of cream cheese filling on the flat side of one cookie. Top with another cookie, flat side down, to create a sandwich.
11. Repeat: Continue until all cookies are filled and assembled.

These steps will guide you in creating these delicious Red Velvet Cookie Sandwiches effortlessly.