Place the chocolate pieces to TM Bowl. Chop 3 sec/Speed 9.
Add butter and sugar to the chocolate. Melt 7 min/60 degrees/Speed 1.
Place flour, baking powder, cocoa powder, vanilla and eggs to the TM Bowl. Combine 10sec/Speed 5
Pour the brownie batter into the prepared tin.
Bake for 50 minutes or until cooked through when tested with a skewer.
Allow the brownie to cool in the tin.
Notes
Please see notes on cooking the brownie, everyone's oven is different so it is important to watch the brownies as they cook. They should still be a little moist but no batter should be uncooked.
Cool brownies in the tray.
The brownies are much easier to cut neatly if they have been refrigerated or frozen prior to cutting.