To enter, you must be of legal drinking age! I am at least 21 years old. I am under 21 years old. WALNUT 40 Proof This unique liqueur smells rich of walnuts and a hint of spice. Ideal after dinner or in desserts. Unlike other liqueurs on the market, KOVAL liqueurs use a white whiskey base, adding more depth to the spirit.Small Batch. Organic.