65g unsweetened cocoa powder
1 teaspoon vanilla extract
100g plain flour
Melt the butter in high for about 30 to 40 seconds. Add the sugar, cocoa and vanilla in that order and mix well.
Add the eggs, slightly whipping after each one. Add the flour and mix well.
Grease a microwave safe dish and spoon in the brownie mixture. Cook on high for 4 to 5 minutes (the more powerful your microwave the less time it takes). Let rest for 10 minutes before cutting.