Turn the Crock-Pot on the High setting, and place the Butter in the Crock-Pot.
Next, add Sugar, Cocoa, Flour, Milk, and Vanilla.
Add the boiling water, and stir all ingredients together, and place the lid on the Crock-Pot.
In a separate bowl, mix the topping; Sugar and Cocoa, together, and sprinkle the topping on top of the ingredients in the Crock-Pot.
Place the lid back on the Crock-Pot, and cook on a high setting for 4 hours.
Cobbler will be a little crunchy, and smooth, and silky.
Top with a huge dip of Vanilla Ice Cream, serve, and Enjoy!