INGREDIENTS
1 cup
unsalted butter, plus more for the pan
1/3 cup
cocoa powder
1 tsp
kosher salt
1 cup
water
2 cups
all-purpose flour, plus more for the pan
1 3/4 cups
sugar
1 1/2 tsp
baking soda
2
large eggs
1/2 cup
sour cream
1 tsp
pure vanilla extract
4 oz
bittersweet chocolate, finely chopped (I used semi-sweet chocolate chips, not chopped)
1 1/2 tbsp
agave nectar or corn syrup
1/2 cup
heavy cream (totally necessary)
1 1/2 tbsp
sugar