These banana nut muffins have a crunchy crumble top and gooey center these banana nut muffins are everything you love about a bakery muffin… moist, tender, packed with banana flavor, and topped with a buttery, crunchy crumble. But the best part? A simple technique that keeps the centers soft, gooey, and bursting with flavor in every bite. No fancy tools required, and they’re so easy, you’ll feel like you’re getting away with something.