Experience Custom Co-Extruded Bars with PennPak Solutions’ New Buhler DDP Co-Extruder in Bethlehem, PA

The bar category is not what it was five years ago. Consumers now read ingredient labels the way they once read fine print on mortgages. They want texture, they want function, and increasingly, they want novelty that does not compromise on nutrition. Satisfying all three at once requires equipment that most contract manufacturers simply do not have. PennPak Solutions, headquartered in Bethlehem, Pennsylvania, just changed that equation.

The company has acquired a Buhler DDP co-extrusion system, one of the most precise and flexible bar-making platforms available to the food manufacturing sector. The machine is installed and operational at the Bethlehem facility, and it is already reshaping what the PennPak team can offer brand partners.

What Co-Extrusion Actually Does, and Why It Matters Now

Co-extrusion is the simultaneous deposition of two or more distinct food components through a single die, producing a finished bar with visually and texturally differentiated layers or a core-and-coat architecture. The process is not new — confectionery producers have employed it for decades. What is new is the scale of accessibility. Until recently, co-extruded bar production required a capital commitment that only the largest manufacturers could absorb. The Buhler DDP platform changed the economics considerably.

Buhler Group, the Swiss-headquartered processing technology leader with more than 160 years of engineering history, designed the DDP series specifically for high-precision layer forming in bar and slab applications. The DDP designation — referring to the machine's dual-die-plate architecture — allows operators to independently control the rheology, temperature, and deposition rate of each layer. The result is a bar that holds its structure through packaging, retail distribution, and even the consumer's bag.

For brand developers, that mechanical precision translates directly into commercial possibility.

The Range of Products Now Within Reach

Consider what co-extrusion actually enables. A peanut butter base can be extruded as the bottom layer while a fruit jelly or jam compound is deposited simultaneously on top. The finished piece sets as a single bar — dense, portable, shelf-stable — that delivers the familiar flavor logic of a peanut butter and jelly sandwich without bread, without refrigeration, and with a macronutrient profile that the brand can dial in.

That example is accessible and familiar, but it barely scratches the surface. Protein layer beneath a salted caramel ribbon. Nut butter core encased in a dark chocolate compound shell. Date-based functional layer paired with a prebiotic fiber top. Collagen-forward base with a white-chocolate-and-raspberry drizzle finish. Each of these concepts is a product brief, not a fantasy. They are currently produced at the Bethlehem facility.

The food industry's interest in layered formats is well-documented. Research published by SPINS and circulated widely in the natural and specialty retail trade consistently shows that bars with visible texture variation command higher average retail prices and generate stronger repeat-purchase rates than their single-composition counterparts. Texture is not merely aesthetic. For the consumer scanning a shelf, it signals craft and ingredient integrity.

Why the East Coast Location Changes the Distribution Math

Geography rarely enters the conversation about contract manufacturing until the shipping invoice arrives. PennPak Solutions' location in Bethlehem, Pennsylvania, deserves attention from any brand that sells or intends to sell across the northeastern United States.

Bethlehem sits at the convergence of Interstate 78 and U.S. Route 22, roughly seven miles west of the I-78/I-287 interchange and within 90 miles of New York City. The city's industrial corridor has direct access to I-95, the busiest freight corridor on the Eastern Seaboard, connecting Miami to Maine through every major population center in between. Bethlehem also sits within a single day's drive of the Port of Philadelphia and the Port of Baltimore, both of which handle substantial import and export volume for food-grade ingredients. Our integrated 3PL and eCommerce fulfilment services are supported by a location situated just minutes from our manufacturing facility.

For brands distributing through natural-channel grocers, conventional supermarket chains, or direct-to-consumer fulfilment centers concentrated in the Northeast, locating production in Bethlehem rather than in the Midwest or on the West Coast typically translates to lower freight cost per unit and faster time from production to shelf. For an emerging brand operating on tight margins, it is often the difference between a viable P&L and one that requires constant investor subsidy.

The Lehigh Valley — the metropolitan area encompassing Bethlehem, Allentown, and Easton — has become one of the more significant food and logistics hubs in the mid-Atlantic region. Major distribution center investments in the corridor have deepened the infrastructure that makes the area function effectively as a staging point for East Coast consumer goods.

The Invitation to Tour the Bethlehem Plant

Plant visits are not something every contract manufacturer offers willingly. PennPak Solutions takes a different position. The team actively invites brand partners, prospective clients, and product developers to come to Bethlehem, walk the production floor, and watch the Buhler DDP system run.

The rationale is straightforward. Food entrepreneurs and brand managers make better decisions about formulation, about production volume, about timing, when they can see the equipment in person and have a direct conversation with the people who operate it. A modern, well-maintained production facility is itself a form of quality assurance communication that no amount of documentation fully replicates.

The Bethlehem plant is modern in the meaningful sense. The Buhler DDP co-extruder represents the most recent of several investments PennPak has made in production capability, and visiting the facility provides a comprehensive picture of what the full co-manufacturing relationship can look like — from ingredient receiving through finished product palletization.

Scheduling a visit is as simple as reaching out through pennpaksolutions.com.

From Concept to Commercial Bar: The PennPak Development Process

The practical question for any brand considering co-extruded bar production is how the development process works. PennPak's approach starts with the concept — often expressed as a flavor vision, a functional objective, or a competitive benchmark — and works backward through formulation to what the Buhler system can achieve.

Texture targets matter early. Because co-extrusion requires each layer to be formulated for compatible viscosity and flow behavior during deposition, the ingredient and format choices in layer two affect what is possible in layer one. That interdependency is not a constraint so much as a design conversation, and it is one the PennPak team is equipped to have.

From there, the path moves through small-batch trials on the co-extruder to evaluate layering fidelity, to shelf-life testing appropriate for the format, to scale-up toward commercial run volumes. The specific timeline varies by project complexity, but the proximity of the Bethlehem facility to East Coast retail markets means that speed-to-shelf is genuinely achievable.

Frequently Asked Questions About PennPak's Co-Extruded Bar Capabilities

What types of bars can PennPak produce with the Buhler DDP co-extruder? PennPak can produce two-layer and multi-component bars in virtually any flavor or functional category — including protein bars, snack bars, nut-butter-based bars, fruit-and-nut combinations, and confection-adjacent formats. If the concept involves distinct layers with different textures or compositions, the Buhler DDP is the right platform to execute it.

Does PennPak offer co-manufacturing services for emerging brands? Yes. PennPak Solutions works with brands across scale, from early-stage natural food companies developing their first SKU to established brands looking to add co-extruded line extensions.

How do I arrange a facility tour in Bethlehem, PA? Contact PennPak Solutions directly through pennpaksolutions.com to schedule a visit. The production team is available to walk prospective partners through the facility and discuss specific project requirements.

Where is PennPak Solutions located, and how does it serve East Coast distribution? PennPak is located in Bethlehem, Pennsylvania, with direct access to I-78 and I-95. The location serves major retail and distribution networks across the Northeast, Mid-Atlantic, and broader Eastern Seaboard.

The Larger Opportunity in a Changing Bar Market

The global protein bar and nutrition bar market continues to attract brand investment, consumer spending, and retail shelf space. Grand View Research estimated the global protein bar market at roughly $6 billion in 2023 and projects compound annual growth through the end of the decade driven by demand in North America and Western Europe. The premium end of that market — bars with distinctive textures, clean labels, and functional differentiation — is growing faster than the commodity segment.

Co-extrusion is not a gimmick in that environment. It is an enabling technology. Brands that can offer a layered format at a price point accessible to mainstream retail have a product architecture that is genuinely difficult to replicate at lower cost. The barrier to imitation is real.

PennPak Solutions' investment in the Buhler DDP co-extruder is a bet on that segment of the market. And the Bethlehem location means that bet is well-positioned to serve the most densely populated consumer market in the United States.

Whatever the concept — the breadless PBJ bite, the protein-caramel stack, the functional layer paired with a confection top — the equipment is ready. The conversation starts at pennpaksolutions.com.

PennPak Solutions is a contract food manufacturer based in Bethlehem, Pennsylvania, specializing in bar production, co-extrusion, and custom formulation for emerging and established food brands.