Combine the dry ingredients in a bowl. Start with the flour, cocoa, sugar, and salt. Mix well using a spoon.
Add the butter, water, and vanilla extract. Continue to mix until all the ingredients are well incorporated.
Compress the mixture by sliding a spoon on top of it. The top portion should be flat.
Microwave for 90 to 100 seconds.
Remove from the microwave and let it cool down.
Enjoy with scoop of vanilla ice cream.