This is the best ever brownie! Truly, it is simple to make, uses regular kitchen ingredients and comes out moist and chocolatey every time.
Preheat oven to 350ºF.
Lightly grease a 9x13" pan with butter. Set aside.
In a large sauce pan set over low heat, melt the butter.
Stir in the cocoa.
Remove from heat and add the sugar and vanilla. Mix until well combined.
Add the eggs one at a time, mixing between each addition.
In a separate bowl, combine the flour, baking powder and salt.
Stir dry ingredients into the chocolate mixture and mix until just combined.
Pour brownie badder into the prepared baking dish and transfer to the preheated oven.
Bake for 30 minutes, or until centre springs back when lightly touched.
Cool completely, in the baking dish before cutting into squares.
For the ganache, chop the chocolate into fine pieces and put into a heat proof pot.
In a small pot, bring the heavy cream to a boil over medium to high heat.
Pour the boiling cream over the finely chopped chocolate. Add a pinch of salt.
Leave to sit for 10 minutes and do not stir. Stirring will cool the ganache too quickly and make it grainy.
After 10 minutes, stir with a whisk until the ganache is nice and creamy.
Use a spatula to scrape down the sides to be sure the chocolate is off the bottom of the pot.
The ganache is ready to use.
Cut the cooled brownie into 2x2-inch squares.
Drizzle over a spoon full of the chocolate ganache.
Sprinkle over a few walnuts and some coarse sea salt.