These espresso brownies are perfect for late-night writing sessions, like those Alice and Hayden endure as they craft the biography of Margaret Ives.
Preheat oven to 350°F (175°C).
In a large bowl, combine melted butter, sugar, eggs, and vanilla.
Stir in cocoa powder, flour, salt, baking powder, and espresso powder until well blended.
Spread the batter into a greased 8x8 inch baking pan.
Bake for 25 minutes, or until a toothpick inserted in the center comes out clean.
Allow to cool before slicing into squares.