Get out that guac recipe for this Hass avo bulk deal! The Hass is the most popular avocado in the United States due to its high production, amazing flavor, and thick, durable skin. These avos will turn black when ripe and should yield slightly to the touch. To help them ripen quicker, throw them in a brown bag with an apple and keep them a slightly-warmer-than-room-temp place in your kitchen.