01 -
Preheat your oven to 350°F (175°C). Grease a 9x9-inch baking dish or line it with parchment paper, leaving some overhang for easy removal.
02 -
In a medium bowl, whisk together the flour, cocoa powder, baking soda, and salt until well combined. Set aside.
03 -
In a large bowl, mix together the sugar, vegetable oil, eggs, vanilla extract, and buttermilk until smooth. Stir in the red food coloring and vinegar until fully incorporated.
04 -
Gradually add the dry ingredients to the wet ingredients, mixing just until combined. Be careful not to overmix, which can make the cake tough.
05 -
Pour the batter into the prepared baking dish, spreading it evenly. Bake in the preheated oven for 20-25 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs (not wet batter).
06 -
Remove the cake from the oven and let it cool completely in the pan on a wire rack. This is important to ensure the cake holds its shape when cut into bites.
07 -
In a medium bowl, beat the softened cream cheese and butter together until smooth and creamy. Gradually add the powdered sugar, mixing until fully incorporated and fluffy. Stir in the vanilla extract.
08 -
Gently fold in the crushed Oreo cookies and mini chocolate chips (if using) until evenly distributed throughout the frosting, being careful not to overmix.
09 -
Once the cake is completely cool, use a sharp knife to cut it into small, bite-sized squares. For clean cuts, wipe the knife blade with a damp cloth between cuts.
10 -
Top each red velvet bite with a generous dollop of the cookies and cream frosting. For a more polished look, use a piping bag fitted with a large round tip. Serve immediately or refrigerate until ready to serve.