Preheat the Oven:
Heat your oven to 350°F (175°C). Grease and flour two 9-inch round cake pans.
Mix Dry Ingredients:
In a bowl, sift together flour, baking powder, baking soda, salt, and cocoa powder. Set aside.
Mix Wet Ingredients:
In another bowl, whisk together buttermilk, oil, eggs, vanilla extract, and vinegar. Add purple food coloring to get the desired shade.
Combine Wet and Dry Ingredients:
Slowly mix the dry ingredients into the wet ingredients. Stir until smooth.
Pour Batter into Pans:
Divide the batter evenly between the two pans. Tap the pans to remove air bubbles.
Bake the Cake:
Bake for 30-35 minutes, or until a toothpick comes out clean from the center.
Cool the Cakes:
Let the cakes cool in the pans for 10 minutes, then transfer them to a wire rack to cool completely.
Make Frosting:
Beat cream cheese and butter until smooth. Gradually add powdered sugar, vanilla extract, and a pinch of salt. Beat until fluffy.
Frost the Cake:
Frost the top of one cake layer, then place the second layer on top and frost the entire cake.
Serve and Enjoy:
Slice and serve your delicious Purple Velvet Cake. Enjoy!