How to achieve a low-sugar/sugar-free biscuit spread recipe?

The core approach to developing low-sugar or sugar-free biscuit spread formulations involves replacing sucrose with sugar alcohol sweeteners such as maltitol and erythritol, while simultaneously adjusting the solid fat content (SFC) curve of the fat system and incorporating dietary fiber to compensate for volume loss and textural changes caused by sugar reduction. A successful formulation must maintain pumpable viscosity of 5,000-20,000 mPa·s at processing temperatures of 40-50°C, and deliver stable texture and shelf life under ambient storage conditions.

Why Reduce Sugar Content in Biscuit Spreads

The global biscuit market was valued at approximately USD 104 billion in 2023, with filled and coated varieties representing one of the fastest-growing sub-segments. Consumer demand for "better-for-you" products is driving biscuit spread formulations toward sugar reduction. Market data shows that products carrying 25%-40% sugar reduction claims continue to gain penetration across European, North American, and Asia-Pacific markets. For food manufacturers, developing low-sugar or sugar-free biscuit spreads is not merely a response to consumer trends, but a strategic entry point into the functional biscuit segment.

However, sugar in biscuit spreads serves functions far beyond sweetness alone. It directly influences texture, water activity (Aw), shelf stability, and processing performance. Simply removing sugar without systematic formulation adjustments leads to grittiness, fat separation, accelerated moisture migration, and ultimately shortened shelf life with compromised consumer experience.

The Multiple Functional Roles of Sugar in Biscuit Spreads

Before exploring replacement strategies, it is essential to understand the specific roles sugar plays within the formulation. The following table summarizes the core functions of sugar in biscuit spreads and the challenges that arise after reduction:

Comparison of Mainstream Sugar Reduction Technical Routes

Currently, the industry employs three primary technical pathways for biscuit spread sugar reduction, each with distinct application scenarios and technical thresholds:

Formulation Design Essentials for Sugar Alcohol Replacement

Sugar alcohols represent the most industrially mature sugar reduction solution. Taking maltitol as an example, its sweetness is approximately 90% that of sucrose, with only half the caloric value, and it does not cause significant blood glucose fluctuations. In biscuit spread formulations, sugar alcohol substitution requires attention to the following technical details:

Particle Size Control: Sugar alcohol grinding particle size should be controlled below 25 microns, consistent with conventional icing sugar standards. Coarser particles create noticeable grittiness in the mouth, destroying the silky mouthfeel that biscuit spreads should deliver. Ultra-fine grinding technology is particularly critical at this stage.

Fat System Adjustment: Sugar alcohols exhibit different hygroscopicity compared to sucrose, altering the solid fat content curve of the fat phase. Formulators must re-evaluate SFC curves to ensure the product remains pumpable at filling temperatures of 40-50°C while presenting a firm yet non-greasy texture at storage temperatures of 20-25°C. The ratio of palm-based fractionated fats to shea butter derivatives often requires re-optimization.

Water Activity Management: Although sugar alcohols possess Aw-lowering capability, their effectiveness differs from sucrose. Formulations may require minor salt additions or dairy powder ratio adjustments to assist in water activity control, ensuring the final product maintains Aw within the safe range of 0.3-0.5 for 12-24 months of ambient shelf life.

Emulsifier Dosage: Following sugar alcohol replacement, system viscosity typically decreases. Lecithin dosage (0.3%-0.5%) or PGPR (polyglycerol polyricinoleate) may need modest increases to maintain the target viscosity range of 5,000-20,000 mPa·s required for filling line compatibility.

Synergistic Application of High-Intensity Sweeteners and Dietary Fiber

For sugar-free (100% sugar reduction) formulations, single sugar alcohols often cannot fully replicate the volume contribution and textural properties of sucrose. This scenario requires a combination approach using high-intensity sweeteners with dietary fiber bulking agents:

Sweetener Selection: Rebaudioside M steviol glycosides and monk fruit extract represent the most commonly used high-intensity sweetener combinations in industrial applications today. Their advantages include sucrose-like sweetness perception, absence of bitter aftertaste, and good thermal stability capable of withstanding high-temperature filling processes up to 50°C.

Bulking Agent Systems: Polydextrose and inulin serve as the two primary choices. Polydextrose provides volume and textural support comparable to sucrose while offering prebiotic functionality. Inulin contributes creamy mouthfeel alongside volume, though usage above 10% may introduce slight bitterness. In practical formulations, these are typically combined at ratios ranging from 3:1 to 5:1.

Texture Compensation Strategy: In sugar-free formulations, the fat phase proportion typically requires a 3%-5% increase to compensate for system consistency loss due to sugar removal. Additionally, microcrystalline cellulose or modified starch may be introduced as auxiliary thickeners, though strict dosage control is necessary to avoid compromising the melt-in-mouth characteristics of the final product.

Formulation Example: Low-Sugar Caramel Biscuit Spread

The following represents an industrially validated low-sugar caramel biscuit spread formulation framework, achieving 35% sugar reduction while maintaining sensory equivalence to the full-sugar version:

This formulation demonstrated stability in accelerated shelf life testing at 38°C/75% RH, showing no fat separation, moisture migration, or microbiological exceedance after 8 weeks. Measured water activity was 0.42, satisfying ambient storage requirements.

Critical Processing Parameter Adjustments

The production process for low-sugar and sugar-free biscuit spreads is fundamentally consistent with conventional products, though the following stages require particular attention:

Mixing Temperature: Sugar alcohols generally exhibit higher melting points than sucrose (maltitol melts at 165-168°C), but remain as solid particles within the processing temperature range. Mixing stage temperature should be controlled at 45-50°C to ensure uniform dispersion of sugar alcohol powder within the molten fat phase, while avoiding localized overheating that could cause fat oxidation.

Refining Duration: Sugar alcohol particles possess slightly greater hardness than sucrose, potentially requiring a 10%-15% extension of refining time to achieve the target particle size distribution (D90 below 25μm). Insufficient refining directly results in coarse finished product texture.

Viscosity Monitoring: Because sugar alcohol systems exhibit different rheological characteristics from sucrose systems, online viscosity monitoring is recommended for each production batch to ensure viscosity at filling temperature remains within the target range of 5,000-20,000 mPa·s. When viscosity deviation exceeds 10%, lecithin or PGPR dosage should be adjusted.

Cooling Curve: Low-sugar formulations typically require slightly faster cooling rates to form stable fat crystal networks. Cooling tunnel temperature settings should be reduced by 2-3°C, or cooling time extended by 5%-10%, to prevent fat migration or surface oiling during storage.

Sensory Evaluation and Texture Optimization

The ultimate success of reduced-sugar formulations depends on consumer sensory acceptance. The following evaluation dimensions are recommended:

If sensory evaluation reveals insufficient sweetness, high-intensity sweetener dosage may be fine-tuned (typically an increase of 0.01%-0.02% produces significant perceptual difference) rather than increasing sugar alcohol content. Excessive sugar alcohol may trigger gastrointestinal discomfort (osmotic diarrhea), which must be declared on product labeling.

Label Compliance and Nutritional Claims

Low-sugar and sugar-free claims are subject to varying regulatory requirements across different markets. Taking the Chinese market as an example:

"Low Sugar" Claim: Products may carry this label only when sugar content per 100g is ≤5g. Here, "sugar" refers to the combined total of monosaccharides and disaccharides, excluding sugar alcohols. Therefore, formulations using maltitol to replace sucrose may legally use "low sugar" labeling as long as the mono- and disaccharide total meets the threshold.

"Sugar-Free" Claim: Products may carry this label only when sugar content per 100g is ≤0.5g. Achieving true sugar-free status requires complete removal of sucrose, glucose, fructose, maltose, and all other mono- and disaccharides, using only sugar alcohols and high-intensity sweeteners. Additionally, raw materials used in the formulation (such as milk powder and biscuit crumbs) must themselves contain no detectable sugars.

Sugar Alcohol Labeling: According to GB 28050, sugar alcohols fall under the carbohydrate category and must be listed separately in the nutrition facts panel. Furthermore, when sugar alcohol content exceeds certain thresholds, a warning statement such as "Excessive consumption may cause diarrhea" must appear on the label.

Supplier Selection and Quality Control

For food manufacturers, the supply chain management of low-sugar and sugar-free biscuit spreads differs from conventional products. During supplier evaluation, the following metrics warrant particular focus:

Raw Material Traceability: Sugar alcohol suppliers should possess robust quality management systems and provide particle size distribution reports, moisture content certificates, and microbiological test results for each batch. Sugar alcohol powder with D90 exceeding 30μm will directly impact finished product mouthfeel.

Formulation Development Support: Superior biscuit spread suppliers do not merely provide raw materials, but should possess the capability to customize formulations according to client targets (reduction percentage, cost range, process conditions). The consistency of scale-up from 50kg pilot batches to 5,000kg production batches serves as a key indicator of supplier technical capability.

Batch-to-Batch Consistency: Suppliers should provide viscosity, water activity, and acid value data across three consecutive batches, with coefficient of variation (CV) ≤5%. Viscosity fluctuations exceeding 10% will directly impact filling line operational efficiency.

Certification Systems: Beyond standard BRC, FSSC 22000, and ISO 22000 certifications, if products target specific markets (such as the EU or US), suppliers must also demonstrate corresponding export qualifications and allergen management capabilities.

Future Trends and Technology Frontiers

Technological evolution in the low-sugar and sugar-free biscuit spread sector continues to accelerate. The following directions merit attention:

Enzymatic Sugar Reduction: Through glucose oxidase or transglucosidase treatment, natural sugar reduction can be achieved without using alternative sweeteners. This technology is currently applied primarily in liquid foods, with application in paste-type biscuit spreads still in the research and development phase, though prospects are promising.

Rare Sugar Applications: Allulose, as a low-calorie rare sugar, delivers approximately 70% of sucrose sweetness with only 0.4kcal/g, and does not participate in Maillard reactions, offering excellent color stability. It has already received approval for use in biscuit products in the North American market and is expected to enter Asia-Pacific markets within the next 2-3 years.

Plant-Based Sugar Reduction Systems: As the plant-based trend extends into the biscuit sector, formulations using oat flour and coconut cream powder to replace dairy powder, combined with natural low-GI sweeteners such as coconut blossom sugar or date paste, are gaining momentum. While these formulations typically offer limited sugar reduction (15%-25%), they satisfy dual demands for clean-label and natural claims.