Melt chocolate and butter in microwave, cool to room tempt
Beat sugar and eggs plus vanilla until thickened
Mix flour and salt in a bowl
Pour egg into melted choc, mix completely
Pour mixture into dry ingredients, mix to just combine, dont overmix
Sprinkle with pecan pieces
Bake on preheated 350 F for 19 mins (convection oven)
Cool completely before slicing