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Measuring & Reducing Food Waste in Events

Low-Waste Events

March 24, 2026

In this first-of-its-kind pilot, event planners and venues worked together to develop new standards for food waste measurement and to implement low-waste guidelines at events. By making simple adjustments, pilot sites across the country reduced food waste in key categories by an average of 55%.

This work resulted in:

  • 50% reduction in bread waste

  • 50% reduction in dressings & sauces waste

  • 85% reduction in fruit waste

  • Determining that 42% of food goes uneaten at buffets

Site Case Studies

Listed below are highlights from participating sites, which demonstrate the status of food waste pre-pilot, what adjustments were made during the pilot, and how those results impacted each site.

What began as minor portioning adjustments became a new food waste prevention standard operating procedure with projected annual savings of nearly 3,000 pounds of food and over $40,000 in food costs.

At this site, plated and family-style meals were produced according to traditional portion standards, with generous quantities of sauces, dressings, and bread pre-set at tables. While these practices ensured guests never ran short, they routinely resulted in overproduction and excess waste—particularly for items served in vessels like salad dressing and cream sauce, where consumption rates were far below what was prepared.

During the pilot, the culinary team refined portioning practices and rebalanced menu components based on observed consumption.

  • Salad dressing was reduced from two vessels per table to one, cutting waste in half and preventing five gallons of surplus at this event.

  • Goat cheese crumbles and cream sauce quantities were reduced through improved portion control, preventing 28.5 pounds of goat cheese crumbles at $510.72 and five gallons of cream sauce at $507.40.

  • Bread service was evaluated at 1.2 rolls per person; the team identified an opportunity to standardize at eight rolls per 10-top tables, projecting a 20% reduction in bread waste.

  • Sliders were rebalanced to better match guest preference. During the pilot, Impossible Burger waste was almost non-existent, a significant reduction by pre-pilot standards, which saw 216 portions wasted.

  • In a family-style lunch for 1,000 guests, cutting pre-set sauces and dressings in half prevented 72 pounds of waste and $1,037 in food costs, while consolidating two pasta sides into one gluten-free option prevented another 114 pounds and $456 in costs.

When implemented together, these adjustments delivered an estimated 10–15% reduction in food waste through prevention alone. The updated standard operating procedure—to serve one vessel of salad dressing and one vessel of sauce per table—was adopted for future events. For a venue serving 40,000 plated meals annually, this change is projected to prevent 2,880 pounds of food waste and save $41,496 in food costs each year.

By right-sizing buffet portions using audit data, this venue cut food prepared per guest by 43% and reduced wasted food costs from 41% to 25% without compromising service.

The venue had been independently audited the previous year, revealing significant overproduction at buffet events. The team prepared 3.5 pounds of food per person, and the cost of wasted food represented 41% of total food costs with clear room for financial and environmental improvement.

Following the onsite training, the culinary team engaged in detailed conversations about determining appropriate portion counts and sizes, particularly for highly wasted items like soup. The chef proactively redesigned menu specifications with updated portions based on waste audit data. The team also requested and implemented smaller vessels for salad dressings. Additionally, they improved communication protocols to ensure guest count information from planners translated into actionable waste prevention strategies across all operational teams.

Food preparation dropped from 3.5 to 2 pounds per person at similar buffet events—a 43% reduction. The cost of wasted food fell from 41% of total food costs to 25%, representing significant cost savings. Most notably, sauces and condiments that were intentionally underproduced according to original specs never ran out during service, giving the team confidence in their ability to deliberately calibrate portion sizes. The pilot also reinforced proper food handling practices for their existing donation partnership.

Cross-team coordination enabled this venue to prevent waste upfront and unlock a new donation pathway for prepared foods that previously had no recovery option.

The venue had a limited donation partnership that only accepted shelf-stable pantry items. This meant all surplus prepared foods were destined for waste, with no opportunity to serve the surrounding community.

This pilot site implemented coordinated actions across departments to prevent food waste and improve recovery. The culinary team portioned salad dressings at 1–2 ounces per person, while the banquets team consolidated ten buffet lines into one as attendance tapered, maintaining quality and production control. The planner collected dietary information in advance and shared it with the venue to inform menu design, and signage encouraged attendees to take only what they would eat. The venue also formed a new partnership with a local organization that could accept prepared foods—expanding donation opportunities beyond packaged items.

Coordinated planning and operational discipline led to notably lower waste levels overall. Portion-controlled condiments reached near-full consumption, and surplus snack foods were reused or donated rather than discarded. The new donation partnership became an essential recovery channel, enabling prepared foods to be redirected from landfill to local community organizations.

A single pre-event attendance update enabled the culinary team to adjust production and prevent roughly 7% of plated meal waste before it was created.

Before the pilot, it was standard practice at this venue to produce food based on the guaranteed number listed on the Banquet Event Order (BEO), even when final attendance was expected to be lower. In this instance, however, the event planner provided an updated attendance estimate during the pre-conference meeting 24 hours prior to the event. Although the guaranteed number was higher, the culinary team adjusted production to the revised estimate, preventing avoidable surplus.

During the pilot, improved communication between the planner and the culinary team led to a proactive adjustment before service. When the planner shared updated registration data showing fewer expected attendees within 24 hours of the event, the executive chef reduced plated meal preparation by 70 plates (about a 7% reduction), focusing on scaling back items that had not yet been prepped. Some items, such as parfaits, had already been produced and could not be adjusted, but the main meal components were right-sized to reflect actual attendance.

By preparing 70 fewer plated meals, the team prevented approximately 7% of food waste before it was created, and saved on food cost, staff labor, and venue resources. Ingredients that were not used—such as eggs, potatoes, and bacon—remained safely stored and were repurposed for future events within two days, leading to cost savings.

Multi-source measurement revealed that 69% of prepared food was eaten and that there was exceptionally low plate waste, giving Aramark’s LifeWorks Restaurant Group rare, actionable visibility into where future reductions are possible.

Providing daily onsite catering for a corporate financial organization across multiple employee centers, the LifeWorks team delivered a vibrant three-day, large scale event featuring breakfast and lunch for approximately 230 guests. The team operated seamlessly with efficient decision-making; however, the pilot revealed an opportunity to standardize production sheet specifications based on food waste data. Additionally, while the cafés maintain an established donation partnership, the event services team identified an opportunity to expand this program to catered events.

The pilot served as a catalyst for deeper, more structured measurement. This site was the only pilot location to capture data from multiple sources—prepared versus consumed food, post-event buffet returns, and plate waste plus trim waste over two service days. This multi-layered dataset aligned well with the client’s data-driven culture and provided a far more complete picture of food flows than is typically available for events.

Early Insights from Measurement

  • 69% eaten food rate: This was the second-highest among pilot sites and well above the pilot average, giving the team clearer visibility into alignment between production and guest demand.

  • Exceptionally low plate waste: Plate waste averaged 1.13 ounces per person—about two tablespoons— compared with common industry norms of 3–4 ounces per person. This suggests guests were mostly taking only what they intended to eat.

  • Butter and cream cheese portion-control units (PCs) used by <1% of guests: Despite the planner’s belief that many guests requested these items, measurement showed that fewer than 1% selected butter or cream cheese PCs. This demonstrated how simple data points can challenge assumptions and encourage evidence-based decisions.

The pilot experience initiated new conversations within the team about refining menu and recipe specifications, clarifying donation pathways for events, and integrating measurement more consistently into workflows. The team also expanded coordination with its measurement partner as part of a broader effort to increase tracking beyond this pilot location.

Because post-event measurement remains uncommon across the industry, the insights gained here created a rare level of visibility. Using what was learned, the site will continue refining its processes and developing an approach to scale measurement across additional operations.

The pilot laid a strong foundation for what comes next. The site now has clearer visibility into consumption patterns, the drivers of uneaten food, and where targeted adjustments—supported by data—can help reduce waste in future events.

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Collaborate Across the Food System

The U.S. Food Waste Pact brings stakeholders from across the supply chain together to prevent and reduce food waste. From producers, to manufacturers, to distributors, to foodservice operators, to grocery retailers, signatories of the Pact report food waste data, discuss best practices, and test and scale food waste solutions.