Best Red Velvet Cake | Reader's Digest Canada

Ingredients

• 1/2 cup butter (softened)
• 1-1/2 cups sugar
• 2 large eggs (room temperature)
• 2 bottles red food colouring (1 ounce each)
• 1 tbsp white vinegar
• 1 tsp vanilla extract
• 2-1/4 cups cake flour
• 2 tbsp baking cocoa
• 1 tsp baking soda
• 1 tsp salt
• 1 cup buttermilk
• 1/2 cup cold water
• 1 tbsp cornstarch
• 2 cups butter (softened)
• 2 tsp vanilla extract
• 3-1/2 cups confectioners' sugar