Ingredients
C

Dairy & Eggs

Colby-Jack

A marbled mild blend of Colby and Monterey Jack; soft and quick-melting, it's the go-to for grilled cheese, quesadillas, and snack boards.

Colby-Jack is a marbled American cheese made by folding together two fresh, cow's-milk cheeses — orange Colby and ivory-white Monterey Jack — and pressing the curds into a single wheel or block. The result is a mild, buttery, slightly tangy cheese that reads as a single product on the plate but reveals two personalities under the knife. Because neither cheese is aged long (often just weeks), the blend stays supple and high in moisture, which is exactly the quality that has made it a workhorse of casual American cooking.

What sets Colby-Jack apart from a plain Jack or Colby is visual and structural: the marbling isn't only decorative. The Colby curds contribute a slightly firmer, more open body and a gentle tang, while the Jack curds bring a creamy, almost elastic melt. Pull a slice off the block and it bends before it snaps; drop it on a hot griddle and it goes fluid long before it turns greasy. That forgiving melt window is why cooks reach for it when they need cheese to behave predictably — on a grilled sandwich, folded into an omelet, or melted over a burger.

In the kitchen, Colby-Jack is best thought of as a crowd-pleasing neutral with a slight sweetness rather than a flavor driver. It rarely competes with the other ingredients on the plate, which is a virtue in quesadillas, sheet-pan nachos, and macaroni and cheese where you want a uniform gooey blanket rather than a sharp, characterful cheese. That same mildness is also its limitation: a dish built entirely on Colby-Jack can read flat, which is why most seasoned cooks pair it with a sharper cheese for depth or anchor it with bold, salty, or acidic partners.

Measured in
g
Storage
Wrapped & Refrigerated

Allergens

Dairy

Find it in

Dairy & Eggs

Suits

Vegetarian

Types & varieties

Co-Jack

Alternate name for the same marbled cheese

Longhorn Colby-Jack

Shaped into a long, ridged cylinder; same blend, different form

Pepper Jack

Monterey Jack studded with jalapeño and sweet-pepper flecks — the spicier cousin, with no Colby in the blend

Marble cheese

Generic marbled cheese — most often Colby and Monterey Jack, but in some regions the term covers cheddar and Swiss, or Colby with cheddar. Check the label.

The Two Cheeses Behind the Marble

Colby and Monterey Jack are both young, cow's-milk American cheeses, but they come from opposite ends of the country and bring different things to the blend. Colby was developed in Colby, Wisconsin, in the 1880s by Joseph Steinwand; it differs from cheddar through a washed-curd process that gives it a more open, slightly springy body and a milder, sweeter flavor. Its orange color comes from annatto rather than the long aging that colors most cheddar.

Monterey Jack is a California original, descended from the queso del país made by Franciscan friars in 19th-century Monterey. It is pale ivory, very high in moisture, and aged only briefly (or not at all), so it stays soft and almost creamy at room temperature. Of the two, Jack is the better melter — its curds will flow into a smooth, glossy layer before Colby curds even begin to slump.

When the two curds are folded together and pressed, the result is a cheese that inherits the marbling's visual contrast, the Colby's gentle tang and open body, and the Jack's near-instant melt. The marbling is structural as well as cosmetic: slices cut across the wheel show a swirl of color and a slightly uneven texture that crisps and browns in appealingly irregular patches on a hot griddle.

Common uses

Grilled cheese sandwichesQuesadillas and fajitasSheet-pan nachos and loaded friesCheeseburgers and stuffed pattiesMacaroni and cheese (often blended with a sharper cheese)Omelets, scrambles, and breakfast quesadillasTacos, burritos, and enchiladasCheese boards and snack plattersMelted over chili, French onion soup, or baked potatoesStuffed peppers and jalapeño poppers

Tips & pitfalls

  • Grate from a cold block for the cleanest melt; pre-shredded bags are dusted with cellulose (anti-caking) that can make melted cheese grainy or weepy.
  • Melt over medium-low heat; high heat causes the fat to separate from the curd and the cheese to turn greasy or rubbery.
  • For cheeseburgers, place a cold slice on the patty in the last minute and cover the pan to trap steam — it melts more evenly than direct heat and won't slough off.
  • Pair Colby-Jack with a sharper cheese (aged cheddar, Parmesan, Gruyère) in mac and cheese to add depth; Colby-Jack alone can read flat in a one-cheese dish.
  • Bring the cheese to cool room temperature (20–30 minutes) before serving on a board so the buttery flavor opens up; ice-cold cheese tastes dull and waxy.
  • Store wrapped in parchment inside a partially sealed plastic bag — fully airtight plastic traps moisture and dulls the flavor, while bare cheese dries out at the edges.
  • Trim any dried-out edges before grating or plating; the surface dryness doesn't affect melting but can taste stale on a board.
  • If a recipe calls for 'marble cheese,' check the label — that name is sometimes used for Colby and cheddar, or for a completely different pairing like cheddar and Swiss, which melt and taste differently.
  • Pasteurized Colby-Jack is the standard; raw-milk versions from small dairies are occasionally available but should be avoided by pregnant people, the elderly, and the immunocompromised.

Nutrition

394kcal

Energy

1648 kJ · per 100 g

Where the calories come from

Protein 24%Carbs 3%Fat 73%

Protein

23.8g

48% DV

Carbs

2.6g

1% DV

Fat

32.1g

41% DV

Fiber

0g

0% DV

Sugars

0.5g

of which

Sodium

604mg

26% DV

Notable micronutrients
Calcium53% DV
Phosphorus37% DV
Vitamin B1235% DV
Vitamin A29% DV
Riboflavin (B2)29% DV
Zinc28% DV

Source · USDA FoodData Central · approx. Cheese, colby

View on FDC →

In the shops

Matched grocery products

No matched grocery products for Colby-Jack yet.

Good to know

Type
Semi-hard, marbled American cheese
Milk
Cow's milk
Components
Colby and Monterey Jack curds blended together
Origin
United States
Color
Orange (Colby) and ivory-white (Monterey Jack), marbled
Color source
Annatto in the Colby portion
Texture
Smooth, semi-firm, creamy when melted
Moisture
Higher than cheddar; not aged long
Aging
Fresh or short-aged (typically weeks, not months)
Meltability
Excellent; smooth and flowing
Storage
Wrapped in parchment or wax paper, then loosely in plastic; refrigerated; use within 2–3 weeks of opening
Common aliases
Co-Jack, Marbled Jack, Colby-Monterey Jack

Substitutes

  • Monterey JackSame melt, milder flavor without the Colby tang
  • ColbySame color story, slightly firmer texture, no marbling
  • Mild cheddarSharper flavor but similar melt; works in quesadillas and burgers
  • Young GoudaCreamy and an excellent melter, slightly nuttier
  • HavartiButtery, mild, melts smoothly; great on boards
  • FontinaRicher and a bit earthier; melts beautifully
  • MuensterPale, mild, and very meltable — a good board stand-in

Pairs with

HamTurkeyApple (Honeycrisp, Fuji)PearGrapesJalapeñoTomatoBaconHearty breads (sourdough, rye, ciabatta)Sausage or chorizoAvocado

Also called

cojack · colby jack cheese

Related