Ka'u Yellow Bourbon

Big Island Coffee Roasters does exactly what the name says: 100% Kona and Hawaiian-grown coffee, roasted to order on the Big Island. They run their own farm and micro-mill, harvest ripe, and roast in small batches — so this is properly single origin, right down to varieties like Kona Peaberry, a dark 'Kona Moon', and barrel-aged lots. There's a café in Hilo, monthly new releases and a subscription club, and they ship internationally at what they call friendly rates. Add renewable-energy operations and close local farmer relationships, and it's an easy pick if you're curious what genuine Hawaiian specialty coffee actually tastes like.