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United States Department of Agriculture

Agricultural Research Service

Research Project: PROCESSING METHODS TO MODIFY THE LEVELS OF BIOLOGICALLY ACTIVE COMPOUNDS IN MILK AND CHEESE

Location: Dairy and Functional Foods

Title: Substituting KCl for NaCl in fresh Queso Fresco

Authors
item Van Hekken, Diane
item Ran, D. -
item Tunick, Michael

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: February 19, 2014
Publication Date: N/A

Technical Abstract: Reducing the sodium level in cheese is challenging when a signature salty flavor is expected, such as in high-moisture Queso Fresco (QF). Fresh starter-free QF was fine milled and dry salted at different levels of NaCl and KCl to obtain total salt levels of 1.5 to 2.0%. The treatments contained 1.5/0, 2.0/0, 1.0/0.5, 1.0/0.75, 1.0/1.0, and 1.5/0.5% NaCl/KCl. Texture profile analysis and small amplitude oscillatory shear analysis were conducted on day 7 and salt intensity levels were evaluated by trained sensory panelists at day 6. Texture profile analysis indicated that the QFs were similar in hardness (16.7 +/- 1.8 N) with the 1.0/0.5 QF being the softest and similar in cohesiveness (0.17 +/- 0.01) with the 1.5/0/5 QF being the least cohesive. Chewiness was highest in the 1.5/0 QF and lowest for the 1.5/0.5 QF (224 and 144 J, respectively). Increasing the total salt in the cheese increased the elastic and viscous moduli although the 1.5/0 QF was higher than the 1.0/0.5 QF and the 1.5/0.5 had the highest values. This suggested that the use of KCl may function differently in the matrix of QF, a cheese is known to be a weak body cheese that crumbles easily. Five of the six QF had saltiness intensity scores 1.0 to 1.5; the 2.0/0 QF had a score of 2. Panelists selected 2 as the target saltiness for QF. The metallic off-flavor commonly associated with KCl was not an issue at levels used in this study. The replacement of NaCl with KCl in the ranges tested had only slight effects on the textural properties, did influence the viscoelastic properties, and did not match the saltiness flavor of NaCl. Results give guidance in developing a reduced sodium QF that has the qualities and flavors demanded by health conscious consumers.

Last Modified: 10/30/2014
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