Red Velvet Brownies with White Chocolate Buttercream Frosting, via Smells Like Home
For the brownies:3 tbsp unsweetened cocoa powder1 oz red food coloring (or a scant 2 tbsp)2 tsp pure vanilla extract, divided1/2 cup (8 tbsp) unsalted butter, at room temperature1&amp;#160;1/2 cups granulated sugar2 large eggs, at room temperature1&amp;#160;1/4 cups all-purpose flour1/4 tsp salt
For the white chocolate buttercream frosting:1/2 cup (8 tbsp) unsalted butter, at room temperature2&amp;#160;1/2 cups powdered sugar1 tsp pure vanilla extract4 oz good-quality white chocolate (not chi