Mochi Lab is known for their butter mochi creations. They put filling into the center of the butter mochi so it has an extra burst of flavor. You can only find them at the Farmers Market (Blaisdell Concert Hall, Kailua, and Ala Moana Center). The butter mochi is $3 each but you're going to want to buy more than one. My favorite is the pandanilla because it's different and no one on the island makes mochi with pandan. If you follow @mochilab808, you can find out their flavors of the week.