Dark Chocolate Brownies (makes 24 squares)

Preheat oven to 325°F (160°C) and butter a 9x13-in. baking pan
6 oz. (170 g) 70% cacao chocolate	melt in double boiler	stir in	stir in	stir in	bake 325°F (160°C) for 35 min.
6 oz. (170 g) butter
1-1/2 cup (300 g) granulated sugar
3 large eggs	lightly beat
1 tsp. (5 mL) vanilla extract
1 cup (125 g) all-purpose flour