Dark Chocolate Brownies

Ingredients (13)

• 1 cup sugar
• 1/2 cup packed brown sugar
• 2/3 cup butter, cubed
• 1/4 cup water
• 1 tablespoon instant espresso powder
• 2-3/4 cups dark chocolate chips, divided
• 4 large eggs, room temperature
• 2 teaspoons vanilla extract
• 1-1/2 cups all-purpose flour
• 1 tablespoon dark baking cocoa
• 1/2 teaspoon baking soda
• 1/2 teaspoon salt
• Flaky sea salt, optional