1. Preheat oven to 350 degrees F, and spray 8x8" baking pan with nonstick spray. Mix the first 8 ingredients together (through vanilla).
2. Pour into prepared baking pan. Mix the brown sugar and 1/4 cup cocoa. Sprinkle over the batter.
3. Pour the hot water over the entire top surface. Bake for about 45 minutes.
The topping sinks through the cake to form a pudding layer at the bottom. This cake tastes so rich, it's hard to believe there's no fat or eggs in it. We prefer it chilled, but it can be served ar room temperature, or even warm, if you can't wait. It will keep for several days (but not in my house!), but do not freeze! If you do, the pudding will turn very watery.'