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An ice cream laboratory guide

Chapter 35: EXERCISE NUMBER XXIV FREEZE ICE CREAM FROM RAW, PASTEURIZED, EMULSIFIED AND HOMOGENIZED CREAM
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About This Book

A laboratory manual guides students through the scientific manufacture of frozen desserts, combining equipment descriptions, sanitation practices, and stepwise laboratory exercises. It explains methods for standardizing mixes and testing fat and solids, the use of stabilizers, and principles of freezing, hardening, and measuring swell (overrun). Practical recipes and procedures cover plain, fruit, nut, custard, parfait, and molded products, ices and sherbets, and related preparations; supplemental exercises address microbial counts, gelatin testing, varying ingredients and processing treatments, judging criteria, and visits to commercial plants for applied observation.

EXERCISE NUMBER XXIV
FREEZE ICE CREAM FROM RAW, PASTEURIZED,
EMULSIFIED AND HOMOGENIZED CREAM

Note effect on swell and quality of ice cream.

In order to have the ice cream in condition to make easy comparison, it should all be made after the same receipt.

  • 40 pounds 20% cream
  •  8 pounds sugar
  •  4 ounces vanilla extract
  •  4 ounces gelatin in 4 pounds water

With sufficient fresh cream to make four batches of ice cream, divide the cream into four equal parts.

  •   I. Freeze one part directly.
  •  II. Pasteurize one part and freeze.
  • III. Emulsify one part and freeze.
  • IV. Homogenize one part and freeze.

If desired all may be aged before freezing.

Fill out record blank on opposite page.

EXERCISE XXIV REPORT

Batch Number   1     2     3     4  
Pounds of Mix        
Gallons of Mix        
Temperature of Mix        
Time of Starting Freezer        
Time of Stopping Freezer        
Temperature of Ice Cream          
Gallons of Ice Cream        
Gallons of Swell        
Per Cent of Swell        
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