For the Cake:

I use an 18×13 sheet cake pan.

In a mixing bowl, combine flour, sugar, and salt.

In a saucepan, melt butter. Add cocoa. Stir together.

Add boiling water, allow mixture to boil for 30 seconds, then turn off heat. Pour over flour mixture, and stir lightly to cool.

In a measuring cup, pour the buttermilk and add beaten eggs, baking soda, and vanilla. Stir buttermilk mixture into butter/chocolate mixture. Pour into sheet cake pan and bake at 350-degrees for 20 minutes.

For the Frosting:
In a medium microwave safe bowl, combine butter and milk and bring to a boil. Stir caramel sauce and then add powdered sugar and vanilla and stir until smooth.

After cake has cooked, remove from oven and poke holes in hot cake with a fork. Pour frosting evenly over top. Immediately sprinkle with top of warm frosting with toasted coconut.

In microwavable bowl, add caramel and evaporated milk and cook on high in 30 second increments, string in between each increment. Continue to cook and stir until caramel is smooth. Drizzle over coconut.

In another microwavable bowl, add chocolate chips and shortening (or oil). Microwave on high in 30 second increments, stirring in between each increment until the chocolate in melted. Drizzle over caramel.

Let the cake cook slightly in order for the cake and topping to firm up.