Sift the flour, sugar, baking powder, soda, and salt together into a large bowl.
Add the butter or margarine, milk, and vanilla to the dry ingredients in the bowl. Beat for 300 strokes, or for approximately 2 minutes at low speed with an electric mixer.
Add the eggs, melted chocolate, and red food coloring to the batter. Beat an additional 300 strokes or 2 minutes at low speed.
Pour into two greased and floured 8 inch layer pans. Bake at 375 degrees F (190 degrees C) for 30 to 35 minutes, or until done.