Preheat oven to 165°C, bake
Line 20 x 20cm tin with baking paper
Melt butter on low heat in medium saucepan until no lumps, whisk in sugar, then remove from heat & add vanilla
Cool slightly, then - one at a time - whisk in eggs until fully combined
Sift in flour and salt, add chocolate & mix together, don't over mix
Pour into tin and bake for 25 - 30 minutes or until a toothpick comes out clean
Leave brownies to cool in tin for 30 minutes, then remove, slice, and enjoy!
Layer up with chocolate brownies for a decedent dessert :)