Preheat oven to 350 degrees.
Grease and flour two 9-inch cake pans.
Cream spry and sugar in the bowl of a stand mixer until fluffy.
Add eggs and beat for one minute.
Mix cocoa, salt, and red color in a small bowl.
Add cocoa mixture to the spry mixture until thoroughly combined.
Mix vanilla and buttermilk and add to the spry mixture alternating with the flour, beginning and ending with flour. Mix thoroughly after each addition.
Mix vinegar and soda in a bowl and fold into the above mixture.
Divide batter into the prepared pans and bake for 25 to 30 minutes. Do not overcook.
Cool on racks.
Cut each layer into two layers.
Frost cake and serve.