Cream shortening and sugar until fluffy add eggs and beat for 1 minute put cocoa and food colorIng in cup, stir to make a paste add shortening mixture and add salt, add vanilla to buttermilk and add slowly to creamed mixture alternating with flour combine vinegar and baking soda in a bowl and mix. Blend mixture in batter do not beat. Bake in 2, 9 inch oans in 350 oven for 25 - 30 minutes.