August 25, 2026 • All Blog Posts • News

Kinds Of Almonds: California Varieties, USDA Grades, And What They Mean For Industrial Buyers

California grows 30+ almond varieties across three classifications. Learn how Nonpareil, California-type, and Mission-type differ — and what USDA grades mean for your spec.

Not all almonds are the same nut. A guide to California’s commercial variety classifications, USDA grade tolerances, and how both dimensions affect industrial sourcing decisions.

Quick Answer

California produces more than 30 almond varieties, grouped into three main commercial classifications: Nonpareil, California-type, and Mission-type. Each classification carries distinct processing characteristics — including blanchability, shell hardness, kernel shape, and flavor adherence — that determine its suitability for specific industrial applications. These variety characteristics interact directly with USDA grade classifications — U.S. Fancy, U.S. Extra No. 1, U.S. No. 1 (also called Supreme in industry), U.S. Select Sheller Run, and U.S. Standard Sheller Run — which define tolerances for defects, sizing, and quality thresholds. Understanding both dimensions is essential for specifying almonds correctly for food manufacturing.

California almond classifications: the three-group framework

Almond variety and almond grade are the two most consequential — and most frequently confused — dimensions of industrial almond specification. Variety determines processing behavior: blanchability, kernel shape, skin texture, flavor adherence. Grade determines quality threshold: how many defects, splits, and dissimilar kernels are allowable per lot. Most sourcing conversations conflate them. This article separates them.

Nonpareil: the benchmark variety

Nonpareil is the most widely grown and commercially significant almond variety in California, and the reference point against which all other varieties are evaluated. Its defining industrial characteristics are:

Blanchability: Nonpareil almonds blanch readily and cleanly. The thin outer shell and smooth kernel surface allow for easy, blemish-free skin removal, producing a high-quality blanched kernel with minimal surface damage.
Kernel appearance: Light-colored, smooth-surfaced kernel with a uniform shape. This visual consistency is why Nonpareil is used anywhere an attractive appearance or strong almond identification is important.
Processing versatility: Nonpareil is readily cut for processed forms — sliced, slivered, diced, or ground into flour. Its smooth surface produces clean cuts with minimal crumbling or surface damage.
Applications: Confectionery coatings, premium snack products, blanched whole almonds, sliced and slivered almonds for bakery and cereal applications, and any product where the almond must be visually recognized. Examples of Nonpareil varieties include Independence and Nonpareil itself.

Almond Board of California — Almond Varieties and Forms

California-type: the manufacturing workhorse

California-type almonds are defined by blanchability — the ability to have their skin removed cleanly — and are used primarily as input material for manufactured products. This classification encompasses a wide range of varieties with diverse shell hardness, kernel shapes, skin colors, and surface characteristics, making them adaptable to nearly any processing application.

Blanchability: Blanchable, though typically with slightly more variation in skin removal quality than Nonpareil. Well suited for slicing, slivering, dicing, and flour production.
Shell hardness: Ranges from soft-shell (Carmel) to semi-hard (Fritz), giving processors flexibility in shelling efficiency and yield.
Applications: Blanching and further processing for manufactured ingredients; sliced and slivered almonds; almond flour and almond butter production; confectionery and bakery applications where visual uniformity is less critical than processing yield. Key varieties include Aldrich, Carmel, and Monterey.

Carmel, for example, has a soft shell with good shell integrity and a medium, narrow kernel shape with slightly wrinkled surface. Fritz is classified as both California-type and Mission-type, with a semi-hard shell and low suture opening, making it suitable for applications requiring salt and flavor adherence as well as blanching.

Almond Board of California — Guide to California Almonds Technical Poster

Mission-type: for roasting, candy, and flavor applications

Mission-type almonds have hard shells and kernels that are small, wide, and often plump. The kernel skin is generally darker than Nonpareil and distinctly wrinkled. This wrinkled surface texture is a functional characteristic: it enhances salt and flavor adherence, making Mission-type almonds particularly well suited for heavily seasoned or coated snack applications.

Blanchability: Blanching is less common for Mission-type almonds. The darker, more complex skin does not remove as cleanly as Nonpareil or California-type varieties.
Flavor adherence: The wrinkled surface texture and skin characteristics allow flavoring agents, salt, chocolate coatings, and candy coatings to adhere more uniformly and in higher quantities per unit weight.
Applications: Dry-roasted and oil-roasted snacks, candy-coated almonds (Jordan almonds and similar), chocolate-coated confections, and applications where the skin’s visual texture is a product feature rather than a drawback. Key varieties include Butte, Fritz, and Padre.

Note that Fritz appears in both California-type and Mission-type classifications, as it shares blanchability with California-type varieties while also having the harder shell and flavor-adherence characteristics of Mission-type. This dual classification is increasingly common as newer varieties are developed.

Almond Board of California — Almond Varieties and Forms

Major California almond varieties: quick-reference for industrial buyers

Variety	Classification	Key Characteristics	Primary Industrial Use
Nonpareil	Nonpareil	Thin shell, smooth kernel, excellent blanchability	Premium snack, blanched whole, sliced/slivered, confectionery, any high-visibility application
Independence	Nonpareil-type	Similar to Nonpareil; smooth kernel, wide range of applications	Snacking, sliced, slivered, processed forms
Carmel	California	Soft shell, medium narrow kernel, slightly wrinkled surface	Manufacturing input; blanching; slicing and dicing
Monterey	California	Wide range of shell hardness; adaptable surface	Blanching, manufactured products, processed ingredient formats
Aldrich	California	California-type adaptability; good processing yield	Manufactured products; blanching; ingredient applications
Fritz	California / Mission	Semi-hard shell, low suture opening; blanchable but also flavor-adherent	Dual use: blanched processed forms and roasted/flavored snack applications
Butte	Mission	Hard shell, small/wide/plump kernel, darker wrinkled skin	Roasted snacks, candy-coated confections, flavored applications
Padre	Mission	Hard shell, plump kernel, high flavor adherence	Roasted snacks, seasoned applications, candy coatings

Almond Board of California — Guide to California Almonds Technical Poster

Almond Board of California — Almond Varieties and Selections Report

USDA grade classifications: what they mean for industrial buyers

USDA rules for different kind of almonds

USDA grades for shelled almonds are voluntary minimum standards — they establish tolerances for quality factors but do not cap how stringently a supplier can perform above them. The California almond industry routinely supplies products that meet specifications exceeding USDA grade standards, but the grade system provides a common reference language for buyer-supplier specification discussions. As the Almond Board of California notes, the higher the percentage listed for a given grade factor, the higher the tolerance for that factor — meaning more of that defect type is permitted at that grade level.

There are five primary shelled almond grades, each defined by its allowable tolerances for dissimilar almonds, doubles, chips and scratch, foreign material, particles and dust, split and broken kernels, other defects, and serious defects.

Almond Board of California — Standards and Grades

Grade	Quality Profile	Best-Fit Industrial Applications
U.S. Fancy	Highest USDA grade. Strictest tolerances across all defect categories. Lowest allowable levels of chips, scratch, dissimilar almonds, splits, and serious defects.	Applications where almond visual appeal is critical: premium retail snack bags, gift packs, confectionery display products, high-visibility coatings.
U.S. Extra No. 1	Similar to U.S. Fancy. Very low defect tolerances across all parameters. Appearance-critical specification.	Food applications where almond appearance is very important but not at Fancy-level premiums: premium bakery, fine pastry toppings, high-quality snack mixes.
U.S. No. 1 (Supreme)	Industry commonly refers to U.S. No. 1 as ‘Supreme’ — though Supreme is not an official USDA grade designation. Balanced defect tolerances suitable for whole almond applications and further processing. Well suited for blanching and roasting.	Whole almond applications, blanched whole almonds, roasted almonds, and general confectionery. The most widely used grade for food manufacturing applications.
U.S. Select Sheller Run (SSR)	Mid-quality commercial grade. Higher tolerance for chips, scratch, and cosmetic defects than U.S. No. 1. Appropriate for applications where almonds with minimal sorting can be incorporated with other ingredients.	Chocolate confectionery where the almond is inside the product (not visible on surface); further processing including blanching, grinding, roasting, dicing, and slicing where surface cosmetic defects are removed or irrelevant.
U.S. Standard Sheller Run	Commercial processing grade. Highest tolerance for split and broken kernels among the five grades. Appropriate for further processing where broken kernels are acceptable or desirable.	Blanching, dicing, grinding, and paste applications where split and broken kernels do not affect finished-product quality. Almond flour, almond butter, and almond paste production.

Almond Board of California — Standards and Grades

USDA — Standards for Grades of Shelled Almonds

USDA grading parameters: the eight defect categories

USDA grades are defined by tolerances across eight specific defect categories. Understanding these parameters helps procurement teams interpret supplier specification sheets and certificates of analysis accurately.

Dissimilar: Different almond varieties mixed in one lot. Relevant for whole almond applications where visual variety uniformity is required.
Doubles: Two kernels developing in one shell; one side of a double kernel is flat or concave. Relevant for applications where kernel shape consistency is important.
Chips and scratch: Loss of kernel skin from mechanical processing. Greater than 1/8″ (3.2mm) in diameter is defined as injury; greater than 1/4″ (6.4mm) in aggregate is a defect. Critical for premium snack and confectionery applications.
Foreign material: Pieces of shell, hulls, or other foreign matter that do not pass through a round-opening screen of 8/64″ (3.2mm) diameter. A food safety and quality parameter for all applications.
Particles and dust: Fragments of almond kernels or other material that pass through a round-opening screen of 8/64″ (3.2mm) diameter. Relevant for product cleanliness and yield.
Split and broken: Seven-eighths or less of complete whole kernels that do not pass through a round-opening screen of 8/64″ (3.2mm) diameter. The primary driver of grade differentiation between SSR and Standard grades.
Other defects: Any defect that materially detracts from the appearance of the kernel or the edible or shipping quality — includes gum, shrivel, brown spot, and discoloration.
Serious defects: Any defect that makes a kernel unsuitable for consumption — includes decay, rancidity, insect injury, and mold damage. Tolerances vary by grade: up to 1% is permitted in U.S. Fancy, 1.5% in U.S. Extra No. 1 and U.S. No. 1, and 2% in U.S. Select Sheller Run and U.S. Standard Sheller Run. For industrial food manufacturing, buyers typically specify serious damage tolerances at the lower end of the applicable grade range, and suppliers operating above USDA minimum standards will often hold to tighter thresholds.

Almond Board of California — Standards and Grades

How variety and grade interact in industrial sourcing

Variety and grade are independent specification dimensions, but they interact in ways that directly affect total procurement cost and production yield. Selecting the wrong combination can increase waste, add processing steps, or result in a finished product that does not meet visual or textural standards.

A Nonpareil kernel at U.S. Select Sheller Run grade will have more chips and surface damage than a Nonpareil at U.S. Fancy, but the base variety’s blanchability and smooth surface remain unchanged. For a flour or butter application, SSR-grade Nonpareil offers strong processing quality at a lower cost than Fancy.
A Mission-type kernel (Butte, Padre) at U.S. No. 1 grade is well suited for roasted flavored snack applications, where the darker skin and wrinkled surface are product features and the grade’s tolerances are appropriate for the visual quality expected in that segment.
For blanched sliced almonds, California-type varieties at SSR grade are often the most efficient specification: the California-type’s blanchability removes surface defects during the blanching process, and the SSR grade’s higher tolerance for chips and scratch is irrelevant once the skin is removed and the kernel is sliced.
For premium whole almonds in high-visibility retail applications, Nonpareil at U.S. Fancy or U.S. Extra No. 1 grade is the standard specification, combining the variety’s visual excellence with the grade’s strictest defect tolerances.

The practical implication is that procurement teams should specify both variety and grade simultaneously, and should evaluate whether the grade tolerance for a given defect category matters for the specific application. Paying for a higher grade than the application requires adds unnecessary cost; specifying a grade too low for a visible-application product creates finished-goods quality risk.

Treehouse Almonds: grading capabilities and variety range for industrial supply

Treehouse California Almonds sources, processes, and supplies almonds across the full range of California varieties and USDA grade classifications, with processing capabilities that exceed USDA minimum standards across all product lines. Our whole almonds wholesale specifications cover multiple AOL sizes and grade levels — from Extra No. 1 and Supreme to Select Sheller Run — in natural, blanched, roasted, organic, and pasteurized formats.

Our laser-equipped sorting and grading technology provides kernel-level precision for size, shape, color, and defect classification, ensuring that the grade specification requested is the grade consistently delivered across supply batches and harvest cycles. All Treehouse whole almond products exceed USDA grades and standards, and our grower-partnered sourcing model gives us early-season visibility into variety availability and quality, supporting more reliable procurement planning for industrial buyers.

For manufacturers requiring specific variety sourcing, custom grade combinations, or specialty specifications not available off the shelf, our development teams collaborate directly with procurement and R&D counterparts to define the right specification for each application. Full specification details are available on the Treehouse Tech Kit and the food safety and quality systems page.