Cosmetic methods for obtaining a slimming effect are disclosed. The methods include providing a composition containing a carob (Ceratonia siliqua L.) seed extract and caffeine or a derivative of caffeine as a slimming active agent and a physiologically acceptable medium, and topically applying the composition on at least a portion of the body or face. The topical application of the composition includes the application of an effective amount of the composition that increases the expression of aquaglyceroporins, increase lipolysis, promotes the elimination of lipids, reduces localized excess body fat, and/or attenuates the “orange peel” appearance of the skin.