Brown Butter Brownie Cookies

Name: Brown Butter Brownie Cookies
Prep time: 20 min
Cook time: 10 min
Total time: 30 min
Cuisine: American
Ingredients: 1 cup [170 g] bittersweet or semisweet chocolate chips; 2 tablespoons warm water; 1 ½ teaspoons pure vanilla extract; 8 tablespoons [1 stick or 113 g] unsalted butter; 2 large eggs (at room temperature); ¾ cup [150 g] granulated sugar; ½ cup [100 g] packed light brown sugar; 1 cup [128 g] all-purpose flour; 2 tablespoons [14 g] natural (unsweetened cocoa powder); 1 teaspoon instant espresso powder, (optional); 1 teaspoon baking powder; ½ teaspoon kosher salt; Flaky sea salt (for sprinkling (optional))