Instructions: Sift cake flour, sugar, soda, cream of tartar and salt into large mixer bowl. Add shortening, half the buttermilk, eggs and vanilla. Beat on medium speed for 2 minutes. Mix in remaining buttermilk and melted chocolate. Beat additional 2 minutes. Spread into 9x13" greased cake pan. Bake at 350 for 40-50 minutes. Cool in pan.

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