PROBLEM TO BE SOLVED: To provide a product satisfying requirements for low-fat products in which unpleasant or strong tastes such as bitterness and acidity are reduced and contents of sugar and/or calories and/or artificial sweetener are not increased because products with such characteristics are desired especially for low-viscosity products (beverages, etc.).SOLUTION: In the food product, bitterness, acidity and/or astringency are masked. The novel product contains a sweetener and 0.2-25 mass% of phytosterol ester. In the food product, the content of the sweetener is smaller than that in a regular product.