In a large bowl, add the flour, sugar, cocoa powder, baking powder, salt, and vanilla powder. Whisk together. Add milk and melted butter. and combine until smooth. *If using vanilla extract instead of powder, add to wet ingredients.
Pour batter in ungreased 9-inch square baking pan or 2 qt casserole dish.
For the Sauce
In a small bowl, combine the sugar, brown sugar and cocoa. Sprinkle evenly over batter. Pour hot water over top; do not stir.
Bake 35 to 40 minutes. Center should be mostly set. Remove and let cool for 15 minutes. Top with vegan whip or ice cream if desired.
Notes
See post for tips and recommendations for this recipe.