Ingredient Comparison
🍅
Diced Tomatoes
vs
🧅
Onion
Diced Tomatoes vs Onion
Both are common in the kitchen, but they behave differently. Here's how to choose between them for your next recipe.
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The short answer
Use Diced Tomatoes when you need it for chili, pasta sauce, pasta sauces. Use Onion when you need it for french cooking, dips, fried rice.
🍅
Diced TomatoesProduce
Tomatoes cut into small pieces, canned or fresh. Base for sauces, soups, chili, and stews.
4 substitutes available
🧅
OnionProduce
Foundational aromatic vegetable in virtually every cuisine. Sweetens and deepens when cooked.
4 substitutes available
Key Differences
| Attribute | Diced Tomatoes | Onion |
|---|---|---|
| Category | Produce | Produce |
| Substitutes | 4 | 4 |
| Diet Options |
Diet Compatibility
Diced Tomatoes
Onion
Substitutes
🍅 Diced Tomatoes Substitutes
- Fresh Tomatoes (chopped)1.5 cups fresh per 14.5 oz can
- Tomato Sauce3/4 cup per 14.5 oz can
- Crushed Tomatoes1:1
- Tomato Paste + Water2 tbsp paste + 1/2 cup water per cup
🧅 Onion Substitutes
- Shallot3 shallots per 1 medium onion
- Leek1 leek per 1 onion
- Green Onion1 bunch per 1 onion
- Onion Powder1 tsp per small onion
Which Should I Use?
Use Diced Tomatoes when…
✅ Best for
chilipasta saucepasta saucespizza saucesalsassaucessoupsstews
Use Onion when…
✅ Best for
French cookingdipsfried ricequicherubssaucesseasoningsoupsstewsstir-friesvinaigrettes