OVERNIGHT OATS: SOURCE-ATTRIBUTED SCALING AND PREPARATION RECORD
Reference: NHS Healthier Families easy overnight oats, serves 4.
https://www.nhs.uk/healthier-families/recipes/easy-overnight-oats/

Factor = wanted recipe-sized portions / original recipe portions.
Every ingredient uses the same factor and retains its original unit.
Calculated amounts are not tested yield, personal portions or nutrient data.

INGREDIENT | ORIGINAL 4 | CALCULATED 1 | CALCULATED 2 | CALCULATED 6
EVENING MIXTURE
Porridge oats | 150 g | 37.5 g | 75 g | 225 g
Dried cranberries | 25 g | 6.25 g | 12.5 g | 37.5 g
Ready-to-eat apricots, chopped | 50 g | 12.5 g | 25 g | 75 g
Sultanas | 25 g | 6.25 g | 12.5 g | 37.5 g
Unsweetened apple juice | 300 mL | 75 mL | 150 mL | 450 mL
Cover and refrigerate overnight as the source directs.

MORNING ADDITIONS
Low-fat natural yoghurt | 8 tbsp | 2 tbsp | 4 tbsp | 12 tbsp
Blueberries | 100 g | 25 g | 50 g | 150 g
Raspberries | 100 g | 25 g | 50 g | 150 g
Follow actual frozen berry preparation instructions, including cooking if required.

BLANK PREPARATION RECORD
Recipe and location:
Original recipe portions:
Wanted recipe-sized portions:
Scaling factor:
Ingredient quantities and original units:
Evening preparation:
Morning additions:
Prepared date and time:
Ingredient opening dates and use-within instructions:
Covered refrigeration and actual temperature check:
Container and actual usable fill:
Substitutions or approximate rounding:
Planned next meal:

No universal jar volume or week-long holding time is supplied.
FDA refrigeration guidance: 40 F or below; refrigerate perishables promptly.
Perishable time limit: 2 hours at room temperature; 1 hour above 90 F.
Normal smell does not establish safety after improper holding.

SIX ORIGINAL CASES AND EXPLANATIONS
Case 1: The source recipe serves four with 150 g oats and 300 mL apple juice. You want two recipe-sized portions. What are the scaled quantities?
Answer: 75 g oats and 150 mL apple juice.
Explanation: Use the factor 2 ÷ 4 = 0.5 for both ingredients and all the others. Keep grams and milliliters as their original units. This is ingredient arithmetic for the source recipe, not a personal serving recommendation or a measured jar volume.

Case 2: You double the oats but leave the apple juice and other ingredients unchanged. Is this the same recipe scaled to twice the portions?
Answer: No. The ingredient proportions changed.
Explanation: A strict batch-size scaling multiplies every ingredient by the same factor. You may choose an adaptation, but record it as a different mixture. Doubling only the oats does not establish twice the portions with the original preparation result.

Case 3: The original mixture uses 150 g oats and 300 mL juice. Does adding those numbers prove that a 450 mL jar will hold the mixture and toppings?
Answer: No. Grams and milliliters cannot be added into a jar volume.
Explanation: The quantities describe different units, and the prepared mixture also contains dried fruit and later toppings. Check the actual portion and usable fill, including room to stir and close the lid. This guide supplies no measured mixture yield or universal headspace percentage.

Case 4: The original four-portion recipe lists eight tablespoons yoghurt. Should each bowl get eight tablespoons before the overnight soak?
Answer: No. The source adds two tablespoons per portion in the morning.
Explanation: The eight-tablespoon figure is the total for four portions. Scaling to two portions gives four tablespoons total, still added at the morning stage. Keep total batch quantities, per-portion quantities and preparation timing separate.

Case 5: You replace apple juice with milk and add a new topping. Can you label your version with the unmodified recipe’s published nutrient values?
Answer: No. The ingredients and the represented breakfast changed.
Explanation: Use current information matching the actual ingredients, amounts and preparation state for a separate estimate. The ingredient scaler does not calculate nutrition. A missing nutrient value remains unknown; it is not a verified zero.

Case 6: A yoghurt-containing mixture stayed on the counter all night but smells normal. Does putting it in the fridge now make it suitable for breakfast?
Answer: No. Normal smell and later refrigeration do not undo unsafe holding.
Explanation: Follow the refrigeration and time limits for perishable ingredients. FDA explains that illness-causing contamination need not look or smell spoiled. Discard a mixture whose handling has exceeded the applicable limits rather than treating the morning refrigeration time as a new start.