Definition: In this task, you have to generate the title of the recipe given its required ingredients and directions.
Input: ingredients:  '1/4 cup unsalted butter, melted', '1 cup sugar', '2 large eggs, at room temperature', '15 ounces sweet potato puree', '2 teaspoons vanilla extract', '1 cup (4 1/4 ounces) unbleached all-purpose flour', '1/2 cup cocoa powder', '1 teaspoon baking powder', '1/2 teaspoon salt', '1/2 teaspoon espresso powder (optional, for enhanced chocolate flavor)', '1 cup semisweet chocolate chips (like SunSpire)',<sep> directions: 'Preheat the oven to 350° F. Grease a 9' x 13' baking pan and set aside.', 'In a large bowl, whisk together the butter, sugar, eggs, sweet potato, and vanilla until well-combined.', 'In a separate bowl, whisk together the flour, cocoa, baking powder, salt, and espresso powder (if using).', 'Add the dry ingredients to the wet and stir until thoroughly combined but don't overmix.', 'Stir in the chocolate chips, then pour the batter into the prepared pan and smooth the top.', 'Bake for about 30 minutes. The top should feel set but still soft and a tester inserted into the center should come out clean or with just a few moist crumbs clinging to it.', 'Remove from the oven and let cool fully before slicing. These freeze beautifully!'

Fudgy Sweet Potato Brownies