It tastes great with a chocolate-like flavor but without the health risks, additives, or contamination that comes with chocolate. Carob is a legume that comes from the carob tree (Ceratonia siliqua), an evergreen tree native to the Mediterranean (it is actually a shrub that is trained into tree form by pruning).Today it is also grown in other warm climates including Florida and the southwestern United States.t tastes great with a chocolate-like flavor but without the health risks, additives, or contamination that comes with chocolate. Carob is a legume that comes from the carob tree (Ceratonia siliqua), an evergreen tree native to the Mediterranean (it is actually a shrub that is trained into tree form by pruning).