preheat the oven to 170°C (325°F)

line the baking tray with greaseproof paper

lightly beat the eggs in a bowl

add the vanilla essence to the eggs

sift the baking powder and flour into a big bowl

melt the chocolate in a glass/metal bowl sitting on a body of boiling water in a pot

when chocolate is melted add the butter

take the chocolate of the heat and stir in the sugar

add the chocolate mixture into dry ingredients and then add the eggs

fold the mixture

add anything you want inside your brownies (optional)

pour it into the baking tray

bake it in the oven for about 20-25 minutes

when they're done the top should be firm and the middle should be soft