Yankee Candle Cassis is the lush flavors of black currant. By simply placing a Yankee Candle Tart in a tart warmer (tart burner) and below burn an unscented tea light, the room filled with a delicious scent. Tarts can also be used in one of the electrical tartwarmers. To make your own fragrance creation, you can mix different scents together. You can then enjoy at least 8 hours.