Preheat and Prepare: Preheat your oven to 350°F (175°C). Grease a 9x9-inch baking pan or line it with parchment paper for easy removal.
Mix Wet Ingredients: In a mixing bowl, whisk together the egg, melted butter, and vanilla extract until well combined.
Incorporate Cake Mix: Gradually add the red velvet cake mix to the wet ingredients, stirring until a thick, smooth batter forms.
Spread Batter: Pour the batter into the prepared baking pan, spreading it out evenly with a spatula.
Bake: Place the pan in the preheated oven and bake for 25-30 minutes, or until the edges are set and a toothpick inserted into the center comes out with a few moist crumbs.
Cool and Serve: Allow the brownies to cool in the pan for about 15 minutes before slicing them into squares or adding your frosting.
Make your cream cheese frosting: beat the butter and cream cheese together until fluffy and well combined. Beat the cream cheese frosting until smooth and well combined.
Spread frosting: Spread your frosting on your brownies.