For the chocolate base
01 -
6 oz (170 g) semisweet chocolate, chopped
02 -
1/2 cup (113 g) unsalted butter, cubed
For the batter
03 -
1/2 cup (63 g) all-purpose flour
04 -
1/4 cup (25 g) unsweetened cocoa powder
05 -
1/2 teaspoon baking powder
06 -
1/2 teaspoon fine salt
07 -
2 large eggs, room temperature
08 -
3/4 cup (150 g) granulated sugar
09 -
1/4 cup (55 g) packed light brown sugar
10 -
1 teaspoon vanilla extract
11 -
1 teaspoon instant espresso powder, optional
12 -
1 cup (170 g) semisweet chocolate chips
13 -
Flaky sea salt for topping, optional