World's First Solera Aged Bourbon. Solera - a stack of barrels where a small portion of whiskey is removed periodically and new whiskey is added. No barrel is every fully emptied, and age and complexity gradually increase over time. Hillrock marries small barrel-aged Hillrock Estate Bourbon with mature seed bourbon before finishing in 20 year-old Oloroso Sherry casks to balance flavors and add layers of complexity…. Current average age of the Hillrock Solera Bourbon is over 6 years and the rye content is approximately 37% Color: Golden Amber Nose: Sweet caramel and vanilla, floral and fruity notes, oak, spice Taste: Full bodied. Warm with maple syrup, brown sugar, molasses, rock candy and toffee. Spicy notes include clove and cinnamon. Well balanced with roasted corn, toast and raisin. The sherry nose and taste are in perfect balance Finish: Medium to long warm finish with sweet caramel and butterscotch. Characteristic Oloroso sherry flavors of walnut, fig and candied fruit balance the spicy rye undertones.