Preheat oven to 350. Combine instant coffee, light brown sugar, granulated sugar, flour, baking powder, baking soda, cocoa powder, and semi-sweet chocolate chips in a mixing bowl and mix to combine.
In a separate bowl, combine vanilla extract and half & half. Stir the wet mixture into the dry mixture with a spoon until combined. Pour it into a buttered or sprayed cake pan.
Then, combine the topping ingredients: brown sugar, granulated sugar, cocoa powder, and salt in a separate bowl.
Generously sprinkle all the sugar cocoa topping over the cake. Don't mix it in!
Then, pour the boiling water over the top (don't mix it in!)
Transfer the cake pan to the oven for 35 minutes. Serve warm.