how could i change this?!
4 ounces (120 grams) unsweetened chocolate, coarsely chopped
1/2 cup (113 grams) unsalted butter, cut into pieces
1 cup (200 grams) granulated white sugar
1 teaspoon pure vanilla extract
2 large eggs
3/4 cup (95 grams) all-purpose flour
1/4 teaspoon salt
3 ounces (90 grams) semi sweet chocolate, chopped
1/3 cup (80 ml) heavy whipping cream (double cream) (35% butterfat)
1 tablespoon (14 grams) unsalted butter
Read more: http://www.joyofbaking.com/barsandsquares/ChocolateBrownies.html#ixzz1IqmX7mty
do you have enough of the semi sweet to use all semi sweet? Yes, it will work. And since you have to chop or grate it anyway, it won't make much difference. The amount of sugar is negligable so don't worry about it.
you just triple the sugar if you only have unsweetend