Creating Red Velvet Sandwich Cookies can be simple if you follow these easy steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C) and line two baking sheets with parchment paper.
2. Mix Dry Ingredients: In a bowl, whisk together the flour, granulated sugar, cocoa powder, baking soda, and salt until well combined.
3. Combine Wet Ingredients: In another bowl, mix the vegetable oil, buttermilk, eggs, red food coloring, vanilla extract, and white vinegar until smooth.
4. Combine Mixtures: Gradually add the wet ingredients to the dry ingredients, stirring until just combined. Be careful not to overmix.
5. Scoop Dough: Using a cookie scoop or tablespoon, drop the dough onto the prepared baking sheets, spacing them about 2 inches apart.
6. Bake: Bake in the preheated oven for 10-12 minutes or until the edges are set. The centers may look slightly underbaked, but they will firm up as they cool.
7. Cool: Allow the cookies to cool on the baking sheets for 5 minutes before transferring them to wire racks to cool completely.
8. Prepare Cream Cheese Filling: In a mixing bowl, beat the softened cream cheese and butter together until smooth. Gradually add the powdered sugar and vanilla extract until well combined and fluffy.
9. Assemble Cookies: Once the cookies are completely cool, spread or pipe a generous amount of cream cheese filling onto the flat side of one cookie, then top with another cookie, flat side down.
10. Chill: For best results, refrigerate the assembled cookies for about 30 minutes to set the filling.