CDM Dough Preparation & Ingredient Handling 5 — Questions and Answers
Question 1: Which type of milk product, when substituted for fresh whole milk in doughnut dough, requires the baker to add water to the formula?
- Evaporated milk
- Non-fat dry milk solids (NFDM) (Correct answer)
- Sweetened condensed milk
- Ultra-high temperature (UHT) whole milk
Correct answer: Non-fat dry milk solids (NFDM)
NFDM is a powder that replaces the milk solids component only; the baker must separately add the equivalent water that fresh milk would have provided.
Question 2: What is the purpose of adding dough conditioners such as ascorbic acid (vitamin C) to yeast-raised doughnut dough?
- To add nutritional value required by US labeling regulations
- To strengthen gluten bonds and improve dough tolerance and volume (Correct answer)
- To slow yeast fermentation for extended shelf life
- To replace the need for salt in the formula
Correct answer: To strengthen gluten bonds and improve dough tolerance and volume
Ascorbic acid oxidizes sulfhydryl groups in gluten proteins, forming stronger disulfide bonds that improve dough strength and gas retention.
Question 3: A recipe calls for compressed (fresh) yeast but only instant dry yeast is available. The correct substitution ratio is approximately:
- Use equal weight of instant dry yeast
- Use one-third the weight of instant dry yeast (Correct answer)
- Use twice the weight of instant dry yeast
- Use half the weight of instant dry yeast
Correct answer: Use one-third the weight of instant dry yeast
Instant dry yeast is approximately three times as potent as compressed yeast, so one-third the weight produces equivalent leavening.
Question 4: Which mixing stage should fat be added to yeast-raised doughnut dough for optimal gluten development?
- At the very beginning with all other ingredients
- After initial gluten structure has developed (cleanup stage) (Correct answer)
- Only after the dough has fully proofed
- During the final 30 seconds of mixing only
Correct answer: After initial gluten structure has developed (cleanup stage)
Adding fat early coats flour proteins and prevents gluten formation; adding it after initial development allows gluten to form first, then fat tenderizes it.
Question 5: What is the Farinograph used to measure in doughnut dough production quality control?
- Fat content and emulsification capacity of shortening
- Flour water absorption and dough mixing tolerance (Correct answer)
- Fermentation gas production rate over time
- Finished doughnut texture and crumb structure
Correct answer: Flour water absorption and dough mixing tolerance
The Farinograph measures the resistance of dough during mixing to determine optimal water absorption and mixing time for a given flour.
Question 6: During doughnut dough production, cross-contamination from allergens is best prevented by:
- Using the same equipment for all dough types to reduce cleaning frequency
- Scheduling allergen-containing doughs last and thoroughly cleaning equipment between runs (Correct answer)
- Labeling finished products only after allergen content is reviewed
- Relying on high frying temperatures to neutralize all allergens
Correct answer: Scheduling allergen-containing doughs last and thoroughly cleaning equipment between runs
Producing allergen-free doughs first and thoroughly sanitizing equipment before allergen-containing doughs prevents cross-contact.
Question 7: When a cake doughnut batter appears lumpy after mixing, the baker should:
- Add more liquid immediately to smooth the batter
- Check whether the dry and wet ingredients were at the correct temperatures before mixing (Correct answer)
- Strain the batter through a sieve to remove all lumps
- Increase mixing speed to maximum for two additional minutes
Correct answer: Check whether the dry and wet ingredients were at the correct temperatures before mixing
Lumpy batter often results from cold fat or improperly tempered ingredients; checking temperatures helps diagnose and correct the root cause.
CDM Dough Preparation & Ingredient Handling 5
Which type of milk product, when substituted for fresh whole milk in doughnut dough, requires the baker to add water to the formula?