Ketel One Citroen flavored vodka begins with Ketel One Vodka, infused with the essence of four different types of citrus lemons, and two types of limes to enhance the freshness. Fragrance. Taking in Ketel One Citroen’s aroma, you'll notice a refreshingly sweet lemon zest fragrance. Flavor. Taste the hints of freshly cut lemon and delicate honey sweetness. Feel. The feel is pleasant, with a silky softness on the palate. Finish. A sweet honey and lemony custard aftertaste lingers gently, followed by a long finish.