Article
Manufacture of Nonfat Yogurt from a High Milk Protein Powder1

https://doi.org/10.3168/jds.S0022-0302(92)77835-7Get rights and content
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Abstract

Nonfat yogurts were manufactured from skim milk fortified with a new high milk protein powder. The powder, containing approximately 84% milk protein, was added to skim milk to obtain 5.2 to 11.3% total protein, 11.1 to 15% total solids, and 1.6 to 7.9% lactose in the yogurt mix. Mixes were homogenized, pasteurized at 90°C for 10 min, and fermented with a yogurt culture at 42°C to pH 4.6. Controls were made from the same skim milk fortified with NDM to approximately 14% total solids. Yogurts made with the protein powder and containing 5.6% protein were similar in firmness to the control and had good flavor when fresh and after 2 wk of storage. Yogurts with more than 5.6% protein were too firm and had an astringent flavor. Acetaldehyde content of all yogurts was comparable with that of the control, and fat content ranged from .18 to .33%. As the protein content of yogurts increased, the porosity of yogurts, as seen by scanning electron microscopy, decreased. Good quality nonfat yogurts can be produced by supplementing skim milk with a high milk protein powder up to 5.6% protein The added protein assists in providing a firm body and minimal whey separation without the use of stabilizers.

Key words

yogurt
protein
quality
structure

Abbreviation key

HMPP
high milk protein powder

Cited by (0)

1

Published with the approval of director of the South Dakota Agricultural Experiment Station as Publication Number 2576 of the Journal Series.

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3

Present address: Department of Dairy Science, Faculty of Agriculture, Tanta University, kafr-Ekheikh, Egypt.