Old Country Kitchenware on Instagram: "Mile High Red Velvet Pound Cake in my new square tube pan! 2 cups (4 sticks) unsalted butter, room temperature 4 cups granulated sugar 1 tbsp vanilla extract 3-5 tbsp red gel food coloring (3+ bottles) 1 teaspoon salt 8 large eggs, room temperature 4 cups cake flour or White Lily All Purpose Flour 1/2 cup cocoa powder 2 tsp white vinegar 1 cup buttermilk, room temperature Preheat oven to 300°F. Prepare Old Country Kitchenware square tube pan by fitting a pa