Prepare 1 (15.25-ounce) box Devil's Food cake mix according to the directions on the box, combining it with the eggs,vegetable oil, and water, Bake the cake in a 9 x 13 x 2-inch pan according to the directions on the box.
While the cake is still warm, use a fork to poke holes all over the top of it.
In medium bowl combine 1 (14-ounce) can sweetened condensed milk and 2 cups shredded coconut, then pour it over the warm cake and spread until the cake is evenly covered. Let the cake finish cooling completely.
Chocolate Icing
Melt ¼ cup unsalted butter in a medium saucepan over medium heat. Whisk in ¼ cup unsweetened cocoa powder until no lumps remain.
Remove from heat and whisk in 2 cups powdered sugar, 1 ½ teaspoon vanilla extract, and 3 tablespoons milk until smooth and creamy. Immediately pour the icing over the cooled cake and spread it out evenly.
Top the cake with ¾ cup sliced almonds, then let the cake sit until the icing has hardened. Slice and serve.