The leaves begin to fall, and a cool, crisp breeze fills the autumn air, all of which can only mean one thing… The return of Blueberry Pumpkin Spice Latte. Anything but basic, this modern sour beer hits the spot in any weather, but the sweet, tart blueberries and warming spices of cinnamon, nutmeg and ginger are best enjoyed as a seasonal sensation. The addition of lactose creates a smooth mouth feel and sweet vanilla flavour to round off each sip.