What's Annatto, and Why Does It Color More Than It Flavors?

Annatto, also sold as achiote, is a seed that colors food orange-red far more than it flavors it. Its taste is faint and earthy, so the real decision is the form: whole seed, powder, paste and infused oil each deliver the color differently.

What is annatto, and is it the same as achiote?

Annatto is the seed of Bixa orellana, a shrubby tree native to the tropical Americas from Mexico to Brazil. Achiote is the same seed under its Spanish name, borrowed from the Nahuatl word āchiotl.

Each spiny red-brown pod holds roughly 30 to 45 seeds, and every seed wears a thin, waxy red coat.

In the Philippines the seed is called atsuete, and in Venezuela it is onoto. The names all describe one spice, although packets sold under them can hold quite different products.

Indigenous peoples of the Americas used that red coat as body paint and lip color long before it became a food dye, which is how the plant earned its English nickname, the lipstick tree.

Plant

Bixa orellana, also called the lipstick tree

Part used

The waxy red coating on the seeds

Native range

Tropical Americas, from Mexico to Brazil

Main pigments

Bixin, which dissolves in fat, and norbixin, which dissolves in water

Other names

Achiote, atsuete, onoto, urucum

Additive code

E160b in the EU, listed by the FDA as annatto extract

The color sits on the outside of the seed, in a thin resinous coat that rubs off orange on your fingers. Bixin makes up most of that coat's pigment, as much as 80 percent in some seeds.

Because bixin dissolves in fat and not in water, warm oil or lard pulls color from whole seeds far more readily than stock does.

That single fact explains why so many annatto traditions begin with a pan of colored oil.

What does annatto taste like?

Mildly earthy, a little peppery and faintly sweet, annatto has a quiet flavor. At the amounts used for color, most people notice the orange long before they taste anything.

That mildness is the reason it spread so widely as a food coloring, from farmhouse cheese to boxed macaroni.

An orange cheese or a brick-red rice tells you nothing about heat, since annatto carries no chile burn at all.

Each form tastes a little different. Oil made from whole seed carries color and a soft toasted note, while ground seed stays in the food and can read as woody or chalky if it never cooks into fat or liquid.

Achiote paste tastes the strongest, though mostly of its other ingredients. Garlic, cumin, dried oregano, black pepper and sour citrus usually speak louder than the seed.

Bitterness is never part of the normal flavor, and it almost always means the seeds scorched in hot oil.

Which form of annatto should you use?

Four forms reach home kitchens, and they are not interchangeable spoon for spoon. The right one depends on whether the dish needs clean colored fat, a dry seasoning or a ready-made marinade.

Whole seed gives the cleanest result, because the pigment moves into the fat and the solids leave with the strainer.

Ground annatto is the convenient choice for dry blends like sazón, where it sits alongside garlic powder and cumin. It still needs moisture and heat to lose its sandy texture, so it belongs early in the cooking rather than on the finished plate.

• Whole seed works as an infusion ingredient.
• Powder disperses quickly but has to cook into liquid or fat.
• Paste brings garlic, spices, salt and acid along with the annatto.

A packet labeled simply "achiote" can hold any of these, so the recipe around it is the best clue. A marinade calling for achiote almost always means the paste, and colored oil almost always starts from whole seed.

The same trade-off between solids and speed runs through every whole versus ground decision, though with annatto the stakes are texture more than aroma.

How much annatto should you use?

A small amount goes a long way, and the dose follows the shade you want.

For infused oil, a common starting point is 2 tablespoons of whole seeds to 1 cup of neutral oil or lard. Recipes then use that oil by the spoonful, since the color is concentrated.

Ground annatto is stronger by volume because nothing is strained away. A Chamorro red rice recipe from America's Test Kitchen uses 1 tablespoon of powder for 2 cups of rice, as an alternative to steeping 3 tablespoons of whole seeds in warm water.

That recipe aims for a deep brick red, so a paler golden rice needs less.

The paste figure comes from Rick Bayless's slow-cooker cochinita pibil, and brands differ enough that it is only a starting point. Some blocks are salty and sharp, while others are mild and dense.

In the America's Test Kitchen sazón, annatto makes up about a quarter of the blend by volume, level with the salt.

That ratio matters when a recipe calls for a packet or spoonful of sazón. The color arrives with a measured dose of salt, so the pot needs less salt added separately.

Extra powder adds grit and a dusty bitterness faster than it deepens the color.

Old seed that barely colors food is better replaced than piled on.

How do you make annatto oil without bitterness?

Low heat decides whether the oil comes out clean or bitter. The infusion works more like steeping tea than frying, moving pigment into fat while the seeds stay below scorching point.

1. Start coldPut 2 tablespoons of whole seeds and 1 cup of neutral oil or lard in a small pan before turning on the burner.
2. Warm gentlyHeat over low until tiny bubbles rise from the seeds and the oil turns deep orange-red, without letting it smoke.
3. Swirl and watchSwirl the pan now and then so no seeds sit on one hot spot, and stop while they are still red-brown.
4. Strain warmPour the oil through a fine strainer into a clean jar and discard the seeds.

Blackening seeds and a sharp, acrid smell mean the heat went too far. Diluting a burned batch with fresh oil lightens the color but keeps the bitterness, so starting again is the only real fix.

Heat also changes the pigment itself.

In laboratory heating tests, bixin breaks down into a yellower compound and small volatile molecules such as xylene. A 2005 study found bixin had almost vanished from extracts heated above 150 °C, about 300 °F.

Hot oil therefore costs color as well as flavor. An overheated batch can look more yellow and duller than one kept at a gentle bubble, even before the seeds turn black.

• The oil stays below smoking temperature.
• The seeds are strained while still red-brown.
• A burned batch gets restarted, not diluted.

The method is gentler than blooming ground spices, where the aim is to fry aroma out of powder in hot fat.

Venezuelan cooks make the same thing with lard and call it manteca onotada. It colors the corn dough of hallacas, the leaf-wrapped tamales served at Christmas.

How do you cook with achiote paste?

Sold in Latin markets as a dense brick, achiote paste has to be loosened with liquid before it can coat anything evenly.

In the Yucatán the paste is called recado rojo, a blend of ground achiote with garlic, black pepper, oregano, ground cumin, cloves and allspice. It is dissolved in sour orange juice to marinate the pork for cochinita pibil, which is then wrapped in banana leaves and slow-roasted.

Sour orange is hard to find outside the region, so recipes often use lime juice or a mix of orange and lime. The acid thins the paste and gives the marinade the sharpness that fatty pork needs.

• Dry pockets are whisked out before marinating.
• Commercial paste may already contain salt.
• Full cooking softens the raw seed taste.

Most commercial blocks already contain salt and often vinegar. Tasting the loosened marinade before adding salt avoids doubling it.

Pockets of undissolved paste taste chalky and salty after cooking, which is why a smooth, pourable mixture works better than a thick smear.

Heat finishes the job by softening the raw seed taste and cooking the garlic, so achiote works as a marinade or braising base rather than a raw condiment.

Making the paste at home takes an electric spice mill, because the seeds are very hard and slow to break down. The Spice House version below makes about 1/4 cup of paste.

1. Grind the dry spicesGrind 1 1/2 tablespoons of annatto seeds with 1/2 tablespoon each of coriander seeds and black peppercorns, 1/2 teaspoon of cumin seeds, 3 cloves and 2 teaspoons of dried oregano to a fine powder.
2. Crush the garlicPound 5 garlic cloves with 1 teaspoon of salt in a mortar.
3. CombineWork the ground spices into the garlic a little at a time.
4. MoistenStir in 1 to 2 tablespoons of white wine vinegar or Seville orange juice until the paste is smooth.

Coarse flecks of seed are the usual flaw, and they stay gritty in the finished marinade.

A homemade paste also lets the cook set the salt, unlike a commercial block.

The same principle drives every spice paste technique. Fat, liquid and heat have to reach the ground ingredients evenly before the paste tastes finished.

What dishes use annatto?

Colored fat at the start of a dish is how annatto shows up in most of the cuisines that use it. The Spanish brought the seed to the Philippines, where it became atsuete and a staple of noodle sauces and stews.

Rice is the most natural match, because oil coats each grain before the liquid goes in and the color spreads evenly. Stews and braises also suit it, since tomato, onion and stock carry its mild flavor without competing.

• Oil coats rice grains before the liquid goes in.
• Powder needs liquid or fat so the seed does not feel sandy.
• Paste carries salt and acid along with the annatto.

Sazón packets owe much of their orange to annatto, which is why a homemade sazón substitute usually starts with ground seed.

Its usual partners are citrusy coriander, garlic, cumin, oregano and sour orange or lime. In a Mexican spice pantry, dried chiles bring fruit and heat while annatto supplies color and a quiet earthy base.

Why is cheese orange, and which foods contain annatto?

Orange cheese is usually orange because of annatto, not because of anything in the milk. English cheesemakers were using annatto by the 19th century, partly to give pale winter cheese the deep color people linked with rich summer milk.

Red Leicester, Double Gloucester, orange Cheddar and French Mimolette still get their color from it.

Cheese color is a different product from the seed in a spice jar. Makers heat the seed pigment with alkali to turn fat-soluble bixin into norbixin, a form that dissolves in water and mixes straight into milk.

Cheese scientists generally accept that annatto adds no flavor anyone can detect, though little research has looked at long-aged cheese.

An FAO trade review estimated that cheese took about half of all annatto color, with fish processing next at about 20 percent. Confectionery came third at about 10 percent.

Norbixin starts to fall out of solution below neutral pH, so clear acidic drinks need a specially stabilized form of annatto color.

Is annatto safe, and can it cause allergic reactions?

Most people eat annatto without trouble, and the European Food Safety Authority set acceptable daily intakes for it in 2016. Those limits are 6 mg of bixin and 0.3 mg of norbixin per kilogram of body weight each day.

A small number of people do react. A 1991 case report described hives, facial swelling and a dangerous drop in blood pressure within 20 minutes of eating a cereal colored with annatto, and skin testing pointed to the dye.

Other published cases describe a toddler with recurring hives, traced by label-matching to annatto-colored cheese crackers. A 2009 editorial described one woman with daily diarrhea and bloating, and her husband, an allergist, named annatto as the probable cause.

These are individual cases, so they show that a reaction can happen without showing how common it is.

That labeling gap makes reading ingredient labels less reliable for annatto than for major allergens. Whole seed and achiote paste are easier to avoid, because they are named and plainly visible in the dish.

What can you substitute for annatto?

Which annatto seed substitute works depends on the job the seed was doing: orange color, a mild earthy note, or the full seasoning of achiote paste. Nothing matches its color without adding a flavor of its own.

Sweet paprika is the easiest swap because it also dissolves in fat and sits closest in hue.

Ground turmeric colors water-based dishes well but turns them yellower and adds a bitter edge. Real saffron gives a gold of its own and a strong floral flavor, which makes it a poor general stand-in at many times the price.

Supermarket colorants such as bijol and sazón carry corn flour or salt alongside the annatto, so they change the seasoning as well as the color.

Chasing an exact shade with a stronger spice usually overshoots, so a substitute-by-job approach that protects the dish's acid and salt matters more than a perfect orange.

How do you buy and store annatto?

Good whole seeds look brick red and slightly waxy rather than dusty brown. Color is the easiest quality check, because the pigment is the reason to buy annatto at all.

Pigment content varies more than most shoppers expect. In a 1990s FAO trade review, seed from rounded pods carried about 5 percent bixin, conical types 3 to 3.6 percent and oval types 1.5 to 2 percent.

Buyers in that trade wanted seed of 2.7 to 3.5 percent, and many farmers had planted weaker varieties below that line. Peru led world production in the same review, with about a third of the total, ahead of Kenya and Brazil.

• Seed colorBrick red to deep rust, with no dull brown seeds mixed in.
• Whole or groundWhole seed holds its color longer, while powder is quicker to use in blends.
• Plain powderA single-ingredient label means the powder can be dosed for color alone.
• Paste labelThe ingredient list shows how much salt, vinegar and other spice come with the achiote.
• Sazón and bijolSalt or corn flour comes along with the color in these blends.
• Colorau or coloríficoThese Brazilian blends grind annatto with cornmeal, sometimes with oil, so part of each spoon is cornmeal rather than seed.

Light is the main threat in the cupboard, because bixin fades in sunlight over time.

Seeds and powder do best under the general spice storage rules, sealed and away from light and stove heat. Opened achiote paste usually goes in the fridge, as most labels direct.

When an old jar needs several times the usual amount to color food, it has gone past its best.

The pigment also stains porous cutting boards, pale towels and some plastics, so glass or metal bowls are the easier choice for mixing paste.