The Hustle
September 7, 2026
How Smucker's Engineered the Perfect Frozen Sandwich Bread
TL;DR
Smucker's spent a decade developing Uncrustables' signature soft bread by reducing air pockets and adding guar gum for freeze-thaw durability, making it structurally distinct from commercial sandwich breads.
Key Takeaways
- 1Uncrustables bread contains guar gum, a stabilizer that improves moisture retention and freeze-thaw performance—the key ingredient absent from other commercial sandwich breads
- 2Smucker's engineered fewer air pockets into the bread formula to allow it to survive the freezing process without degradation
- 3The unbeatably soft bread is proprietary to Uncrustables and took 10 years to perfect, making it a core competitive differentiator
Notable Quotes
“The only ingredient unique to Uncrustables was guar gum, a stabilizer commonly used to improve moisture retention and freeze-thaw performance.”
Chapters
1. The Challenge: Freezing Sandwich Bread
Standard commercial sandwich breads don't perform well when frozen, requiring Smucker's to develop a specialized formula that could withstand freezer conditions.
2. The Solution: Guar Gum and Air Pocket Reduction
Ingredient analysis revealed guar gum as the key differentiator, combined with a structural design featuring fewer air pockets to maintain texture through freeze-thaw cycles.
Key People & Entities
- Smucker's
- Food company that developed Uncrustables frozen sandwiches with proprietary bread technology
- Uncrustables
- Smucker's frozen sandwich product line featuring the specialized soft bread
Glossary
- Guar gum
- A natural stabilizer derived from guar beans that improves moisture retention and helps products maintain texture during freeze-thaw cycles
- Freeze-thaw performance
- The ability of a food product to maintain its structural integrity and texture quality when frozen and then thawed