4 darkest Recipes

all-purpose flour, unsweetened cocoa powder, baking powder, baking soda, kosher salt, buttermilk , plus, buttermilk, water, pure vanilla extract, unsalted butter, cut in 1/2-inch pieces, bittersweet chocolate , preferably 70% cacao, coarsely chopped, granulated sugar , plus, granulated sugar, dark brown sugar , plus, dark brown sugar, eggs, at room temperature

flour, cocoa powder, baking soda, baking powder, salt, unsalted butter, sugar, eggs, dark chocolate chips

swordfish , center cut, sliced 1/8th-inch thick on slicer or by fish monger in 4 pieces, leeks , darkest green (top 3 inches) removed, remainder cut into 4-inch julienne, zest and juice of 1 pink grapefruit, dijon mustard, extra virgin olive oil plus 2 tbsp, black mustard seeds, zest and segments of 1 pink grapefruit, lemon juice