1 (18.25 ounce) package white cake mix
1 (3.3 ounce) package instant vanilla pudding mix
1 (3.9 ounce) package non-instant chocolate pudding mix
1 (11 ounce) package frozen dark confectioners' coating (13 ounce)
Prepare the cake mix according to package directions for a 10x13 inch pan and prepared pan. Grease and flour a 10x13 inch pan.
In a large bowl, stir together the flour, baking soda, and salt; mix with a fork. Set aside.
Add the buttermilk and milk mixture and stir just together. Spread the batter evenly onto the prepared pan.
Bake for 60 to 80 minutes in the preheated oven. Cool 30 to 35 minutes in the pan. Spread the remaining buttermilk mixture over the cooled cake.
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