Using Roasted Red Peppers (jarred) Instead of Canned Tomatoes: Exact Ratio

Canned Tomatoes provides texture, moisture, and flavor in cooking and baking. When you substitute Roasted Red Peppers (jarred) at a ratio of 1:1 (drained and chopped), you preserve the key properties needed for sauces and soups and pasta and nightshade-free cooking.

There is a noticeable difference in the final result: sweet, smoky, and mild. The dish will taste different but can be delicious in its own right. Works best when blended into sauces. This trade-off is generally acceptable in sauces where the substitute's other qualities compensate.

As a plant-based option, roasted red peppers (jarred) also makes this swap suitable for vegan and dairy-free diets without sacrificing the role that canned tomatoes plays in the recipe.

Nutritional and safety data referenced from USDA FoodData Central (nutritional composition data) and FoodSafety.gov (food allergen and safety information).

1. Measure the substitute. For every amount of canned tomatoes your recipe calls for, use 1:1 (drained and chopped). Use standard measuring cups or a kitchen scale for accuracy.
2. Prepare if needed. Add roasted red peppers (jarred) at the same point in the recipe where you would normally add canned tomatoes.
3. Mix into your recipe. Add the substitute where the original ingredient is called for. Mix thoroughly to distribute evenly. This method works especially well in sauces, soups, pasta, nightshade-free cooking.
4. Adjust and taste. After combining, check the consistency of your batter, dough, or mixture. Since this substitute changes the flavor profile slightly, taste and adjust seasoning if needed. Keep in mind: not a true tomato replacement.

Tomatoes that are peeled, processed, and sealed in cans at peak ripeness. Available as whole, diced, crushed, or pureed. A kitchen essential for sauces, soups, stews, chili, and braises that provides consistent tomato flavor year-round.

People substitute canned tomatoes for a variety of reasons: dietary restrictions (vegan, dairy-free, or gluten-free cooking), allergies or intolerances, running out mid-recipe, or simply preferring a different flavor profile. Whatever the reason, the key is matching the functional role that canned tomatoes plays, which is primarily texture, moisture, and flavor.

One 14.5 oz can of tomatoes equals about 1.75 cups including liquid. For recipes needing chunky tomatoes, dice fresh ones or use whole canned tomatoes and crush by hand. For smooth sauces, tomato paste diluted with water gives the most concentrated flavor.

Roasted Red Peppers (jarred) is one of 4 alternatives you can use instead of canned tomatoes. For a complete list of canned tomatoes substitutes with ratios and cooking tips, visit the full canned tomatoes substitute page.