Sugar Science

Sugar is the most powerful tool for controlling frozen dessert texture. Understanding how different sugars behave—their sweetness, their effect on freezing point, and their secondary properties—enables precise texture control independent of sweetness.

The Dual Role of Sugar

Sugar serves two distinct functions that can be adjusted independently:

1. Sweetness — How sweet the product tastes (measured by POD)
2. Freezing Point Depression — How soft the product stays when frozen (measured by PAC)

The key insight: these properties don’t move together. You can make a product softer without making it sweeter (use dextrose). You can make it sweeter without making it softer (use trehalose blend). This independence is the foundation of advanced formulation.

POD: Sweetening Power

POD (Potere Dolcificante) measures relative sweetness compared to sucrose.

Sugar	POD	Perception
Sucrose (reference)	100	Baseline sweetness
Fructose	170	Very sweet, immediate impact
Invert sugar	130	Sweet, clean finish
Glucose syrup DE40	40	Mildly sweet
Dextrose	70	Less sweet than sucrose
Trehalose	45	Barely sweet
Lactose	16	Very low sweetness
Maltodextrin	0–20	Essentially non-sweet

Calculating POD

Total POD = Σ (sugar weight × POD value) / total sugar weight

Example: 100g sucrose + 50g dextrose

Total POD = [(100 × 100) + (50 × 70)] / 150 = 13,500 / 150 = 90

The blend is 90% as sweet as pure sucrose by weight.

PAC: Freezing Point Depression

PAC (Potere Anti-Congelante) measures freezing point depression relative to sucrose.

Sugar	PAC	Effect
Sucrose (reference)	100	Baseline FPD
Dextrose	190	Nearly double FPD
Fructose	190	Nearly double FPD
Invert sugar	190	Nearly double FPD
Trehalose	100	Same FPD as sucrose
Glucose syrup DE40	90	Slightly less than sucrose
Lactose	100	Same FPD as sucrose

Info

PAC correlates with molecular weight. Smaller molecules (monosaccharides like dextrose and fructose) depress freezing point more than larger molecules (disaccharides like sucrose and trehalose).

Calculating PAC

PAC = Σ (sugar weight × PAC value) / total base weight × 10

Caution

Note the denominator: PAC is calculated against total base weight, not just sugar weight. This is different from POD calculation.

Example: Base weight 1000g, containing 150g sucrose + 30g dextrose

PAC = [(150 × 100) + (30 × 190)] / 1000 × 10
PAC = [15,000 + 5,700] / 1000 × 10
PAC = 20,700 / 1000 × 10
PAC = 207

Target PAC Ranges

Product Type	Target PAC	Serving Temp
Gelato	260–280	–12°C / 10°F
Ice cream	240–260	–14°C / 7°F
Sorbet	280–320	–12°C / 10°F
Soft serve	300–340	–6°C / 21°F

Tip

Higher PAC = softer product at any given temperature. If your gelato is too hard, increase PAC (add dextrose). If it won’t set properly, decrease PAC (reduce dextrose, increase sucrose).

Sugar Profiles

Sucrose (Table Sugar)

Property	Value
POD	100
PAC	100
Source	Sugar cane, sugar beet
Behavior	Clean sweetness, neutral baseline

Role in formulation: Primary sweetener and reference point. Use as baseline, then adjust with other sugars.

Dextrose (Glucose)

Property	Value
POD	70
PAC	190
Source	Corn starch hydrolysis
Behavior	Cooling effect on palate, less cloying

Role in formulation: The workhorse for increasing PAC without proportional sweetness increase. Essential for scoopable texture.

Note

Dextrose produces a slight cooling sensation and has a cleaner finish than sucrose. Many find this enhances fruit flavors.

Fructose

Property	Value
POD	170
PAC	190
Source	Fruit, honey, corn syrup
Behavior	Immediate sweetness, can be cloying

Role in formulation: Use sparingly to boost sweetness and PAC simultaneously. High quantities can be overwhelming.

Trehalose

Property	Value
POD	45
PAC	100
Source	Fungal fermentation
Behavior	Mild sweetness, excellent cryoprotection

Role in formulation: Reduce perceived sweetness without changing freezing behavior. Excellent for rich chocolate bases where full sucrose is cloying. Also improves freeze-thaw stability.

Invert Sugar (Trimoline)

Property	Value
POD	130
PAC	190
Source	Acid or enzyme-hydrolyzed sucrose
Behavior	Smooth texture, hygroscopic, prevents crystallization

Role in formulation: Improves texture smoothness and prevents sugar crystallization. Adds shine. Hygroscopic nature can cause stickiness in dry environments.

Glucose Syrup (DE40)

Property	Value
POD	40
PAC	90
Source	Corn or wheat starch hydrolysis
Behavior	Adds body, chewiness, controls crystallization

Role in formulation: Provides body and chew without sweetness. Interferes with ice crystal growth. Standard in professional gelato formulation.

Info

DE (Dextrose Equivalent) indicates the degree of starch hydrolysis. Higher DE = sweeter, more FPD. DE40 is standard; DE60 is available for higher sweetness applications.

Lactose

Property	Value
POD	16
PAC	100
Source	Milk (naturally present)
Behavior	Very low sweetness, can crystallize if concentrated

Role in formulation: Not added intentionally—present in milk and cream. Contributes to PAC without sweetness. Excessive concentration (above 8%) can cause sandiness.

Formulation Strategies

Strategy 1: Standard Gelato

Replace 15–25% of sucrose with dextrose to boost PAC while maintaining sweetness.

Component	Amount	POD Contribution	PAC Contribution
Sucrose	120g	120	12,000
Dextrose	30g	21	5,700
Total	150g	141 effective	17,700

For 1000g base: PAC = 177… still needs adjustment.

Strategy 2: Reduced Sweetness (Chocolate Base)

Chocolate is already sweet. Replace sucrose with trehalose to maintain texture while reducing sweetness.

Component	Amount	POD Contribution	PAC Contribution
Sucrose	80g	80	8,000
Trehalose	40g	18	4,000
Dextrose	30g	21	5,700
Total	150g	119 effective	17,700

Same PAC as Strategy 1, but 15% less perceived sweetness.

Strategy 3: Maximum Softness (Sorbet)

High PAC for scoopable fat-free product:

Component	Amount	POD Contribution	PAC Contribution
Sucrose	150g	150	15,000
Dextrose	80g	56	15,200
Glucose syrup DE40	40g	16	3,600
Total	270g	222 effective	33,800

For 1000g base: PAC = 338. Very soft, suitable for sorbet served at –12°C.

Practical Calculation Workflow

Determine Base Weight

Sum all ingredients in your formula (milk, cream, sugar, yolks, etc.)

Set Sweetness Target

Decide on desired sweetness level. Standard: 14–18% total sugar at ~100 POD equivalent.

Set PAC Target

Based on product type and serving temperature. Gelato: 260–280.

Choose Sugar Blend

Use calculation to find blend achieving both targets.

Verify

Calculate actual POD and PAC for your blend. Adjust as needed.

Common Mistakes

Mistake 1: All Sucrose

Using only sucrose results in PAC around 180–200 for typical sugar levels. Product will be too hard at serving temperature.

Fix: Replace 20–30% of sucrose with dextrose.

Mistake 2: Too Much Dextrose

Excessive dextrose (over 40% of total sugar) creates gummy texture and excessive softness.

Fix: Balance with sucrose and/or glucose syrup.

Mistake 3: Ignoring Lactose

Forgetting that milk contributes lactose to PAC calculation results in higher-than-expected PAC.

Fix: Include lactose in calculations: approximately 5% of milk weight.

Mistake 4: Oversweetening to Achieve PAC

Adding more sugar to raise PAC also raises sweetness.

Fix: Shift ratio toward dextrose rather than adding more total sugar.

Reference Tables

Complete Sugar Properties

Sugar	POD	PAC	Molecular Weight	Hygroscopic	Crystal Control
Sucrose	100	100	342	Low	None
Dextrose	70	190	180	Medium	Moderate
Fructose	170	190	180	High	Good
Trehalose	45	100	342	Low	Excellent
Invert sugar	130	190	—	High	Excellent
Glucose DE40	40	90	—	Low	Excellent
Maltodextrin DE10	10	50	—	Low	Moderate

Quick Conversion

To swap 100g sucrose:

Replacement	Amount for Equal Sweetness	Effect on PAC
Dextrose	143g	+90% PAC
Fructose	59g	+12% PAC
Trehalose	222g	+122% PAC
Invert sugar	77g	+46% PAC
Glucose DE40	250g	+125% PAC

Caution

These conversions are for equal sweetness, not equal weight. Substituting by weight without adjusting for POD/PAC differences will produce unexpected results.

Calculator

For interactive PAC/POD calculation, see the PAC Calculator.

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