Why it works: Onion and garlic match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 29,058 recipes. Both carry furaneol, which smells caramel, strawberry. The science ↓
Italian Spaghetti Sauce
Ingredients
Directions
Make the base
Combine celery, onion, garlic, parsley, and olive oil in a pot to cover the bottom.
Simmer slowly until golden brown.
Add meat and tomatoes
Add chopped meat and dark wine.
Cook for 30 minutes.
Stir in tomatoes and Italian tomato sauce.
Season with salt and pepper.
Cook very slowly for 3 hours.
Serve
Serve with spaghetti.
Top with grated cheese.
Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.
-
Onion + garlictop 1% of all pairsSmell alikestrongCooked together29,058 recipes
Shared aroma: furaneol (caramel, strawberry).
-
Olive + tomatotop 1% of all pairsSmell alikemoderateCooked together15,539 recipes
Shared aroma: 3-hexenal (apple, fruity).
-
Celery + parsleytop 1% of all pairsSmell alikestrongCooked together6,810 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Garlic + olivetop 2% of all pairsSmell alikemoderateCooked together25,665 recipes
Shared aroma: linalool (floral, citrus).
-
Garlic + tomatotop 3% of all pairsSmell alikemoderateCooked together14,076 recipes
Shared aroma: furaneol (caramel, strawberry).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Olive oil
- Carries the aromatics and browns the vegetables, adding fat and flavor to the base.
- Chopped meat
- Adds savory, browned richness and body to the sauce.
- Dark wine
- Adds acidity and depth, helping lift flavors from the browned bits in the pot.
- Tomatoes
- Form the bulk of the sauce, providing acidity, moisture and body.
- Italian tomato sauce
- Adds extra tomato body and concentrated flavor to the sauce.
- Onion
- Provides sweetness and aromatic depth as it browns in the oil.
The step that matters
Simmer slowly until golden brown. Browning the onion, celery and garlic in oil builds sweet, deep flavor through caramelization. Rushing this with high heat can scorch the garlic and leave a bitter taste.
Swap the onion
How well each one fits the dish's main ingredients (celery, garlic, parsley, olive, meat, wine, tomato):
- Carrotfits better
- Eggplantfits better
- Potatofits better
- Onionthe original
Fit is the average pairing score against celery, garlic, parsley, olive, meat, wine, tomato. Candidates are from the same food group and used in at least 100 recipes.
“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.
Meatless Tomato Soup23 recipes
Tomato Soup526 recipes
Cream of Celery Soup113 recipes
Cream of Tomato Soup107 recipes