Banana Crunch Muffins

First off, I love to bake, so there's always some tasty little treat hanging around to be munched on. Whenever Dearest and I eat around 7th & Irving back home, we stop at this little bakery called Tart to Tart. They've got the best muffins, especially the banana ones. Combined with Dearest's love for them and the overly ripe bananas hanging out at home, I whipped some up. The crunchy top was delicious, but the actual muffin was quite dry. Maybe substituting olive oil for the butter next time will make it more moist?