One Bowl Brownies

Bahan-bahan (16 porsi)

• ½ cup unsalted butter (or canola oil or extra-virgin olive oil*)
• 1 cup granulated sugar
• ½ cup powdered sugar (sifted if lumpy)
• ⅔ cup cocoa powder (sifted if lumpy)
• 1 teaspoon espresso powder (optional; will yield a more intensely chocolaty brownie)
• ¾ teaspoon kosher salt
• 2 tablespoons water
• 1 teaspoon pure vanilla extract
• 2 large eggs
• ½ cup all-purpose flour
• ¼ cup whole wheat flour (or additional all-purpose flour)
• ½ cup dark chocolate chips
• Flaky sea salt (such as Malon or fleur de sel (optional))