Flavor profile
What Flavor Is Mello Yello?
Coca-Cola's long-running answer to Mountain Dew, and a useful study in what "smooth" means on a citrus soda label.
What flavor is Mello Yello?
Mello Yello tastes of sweet mixed citrus, close to Mountain Dew, with a juicy orange note from the concentrated orange juice on its US label. Coca-Cola calls it a "smooth citrus" soda and has never named the oils.
Flavor profile
- Family
- Citrus
- Character
- Sweet mixed citrus, rounded orange middle, soft acid, faint caffeine bitterness
- Key components
- Unpublished. A citrus soda of this type uses citral and limonene from lemon and lime oils, with orange oil aldehydes and orange juice
- Impact
- High
- Typical dosage
- 0.10-0.20% in a full-sugar soda, usually as an emulsion
- Heat stability
- Poor; citrus top notes go first
- pH stability
- Moderate; citral breaks down in acid over shelf life
- Natural availability
- Natural citrus flavors are widely available; a natural yellow-green color is the hard part
Coca-Cola launched Mello Yello on March 12, 1979, to take on PepsiCo's Mountain Dew. It is still sold, mainly in the Midwest and Southeast, and it is rarely advertised. The rumors that it was discontinued are wrong. In 2022 the brand said production would be limited, not ended.2
What you are tasting
Sweet mixed citrus, with no single fruit named. The US label lists concentrated orange juice high up, just after the corn syrup.1 It gives a juicy, rounded orange note under the brighter citrus.
Coca-Cola's own word for the taste is "smooth". Two items on the label fit that. Potassium citrate is a buffer, which softens the sourness of the citric acid. Carob bean gum is a thickener that adds a little body. It comes last on the label, so the amount is small.
There is caffeine too. Coca-Cola's page lists it but not the amount. US retail listings give 51 mg per 12 oz can.3 You may notice a faint bitterness in the finish.
Next to its rivals
| Soda | Maker | Caffeine per 12 oz | Orange juice on the label |
|---|---|---|---|
| Mello Yello | Coca-Cola | 51 mg (retail listing) | Yes |
| Mountain Dew | PepsiCo | 54 mg | Yes |
| Surge | Coca-Cola | About 51 mg (original) | Yes |
| Sprite | Coca-Cola | None | No |
Coca-Cola had a second try at the same market in 1997 with Surge. Mello Yello outlasted it.
What the Zero Sugar label tells you
Mello Yello Zero Sugar's label reads like a textbook cloud emulsion. Acacia gum coats the oil droplets. Sucrose acetate isobutyrate (SAIB) makes them heavy enough not to float. Medium-chain triglycerides form part of the oil phase. The sweeteners are aspartame and acesulfame potassium.
SAIB has a legal ceiling in US soft drinks: 300 mg per kg of the finished drink.4 Design the emulsion around that limit from the start.
Taking sugar out removes body as well as sweetness. Both the caffeine and the citrus oil get easier to taste. See sugar reduction.
Building a smooth citrus soda
Decide on juice early. Orange juice concentrate rounds out the citrus. It also adds cost and solids that can settle.
Protect the oils. The label lists calcium disodium EDTA, which ties up the trace metals that speed up oxidation. Citral, the main lemon note, still breaks down in acid over time.
Plan for the caffeine. At around 50 mg per can, the bitterness is small but real, and it shows more without sugar. See flavor masking.
Expect trouble with the color. The yellow-green comes from Yellow 5. Natural yellows tend to read more orange or fade in light.
Call it a citrus soda. Mello Yello is a Coca-Cola trademark. A flavor house will list its version as a "citrus soda type".
Sources
- 1Mello Yello — The Coca-Cola Company (US) · accessed 2026-10-26↩
- 2Don't Worry Mello Yello Enthusiasts, It Wasn't Actually Discontinued — Tasting Table · accessed 2026-10-26↩
- 3Mello Yello Citrus Soda, 12 pk, 12 oz cans — Food Lion (product listing) · accessed 2026-10-26↩
- 421 CFR 172.833 Sucrose acetate isobutyrate (SAIB) — Legal Information Institute, Cornell Law School · accessed 2026-10-26↩