Go Back
Bowl of smooth tomato soup with a rich red color and fresh herbs

5 Ingredient Tomato Soup with San Marzano Tomatoes

This 5 ingredient tomato soup is a creamy, smooth blended soup with rich tomato flavor and a comforting homemade appeal. It is an easy choice when you want a simple, flavorful bowl made with a short ingredient list.
Print Recipe Pin Recipe
Prep Time 5 minutes
Cook Time 45 minutes
Total Time 50 minutes
Servings: 4 servings
Course: Soup
Cuisine: American
Calories: 284
Ingredients Method Notes

Ingredients
  

  • two 28-ounce cans San Marzano tomatoes (whole or crushed)
  • 1 stick (8 tablespoons) salted butter
  • 1 yellow onion, peel removed and cut into 4 chunks
  • 3-4 cloves smashed garlic (optional)
  • 1 1/2 teaspoons salt

Method
 

Cooking
  1. Add the tomatoes, butter, and onion to a large saucepan or Dutch oven. Bring the mixture to a low bubble, then reduce the heat to medium low. Partially cover with a lid and simmer for 45 minutes, stirring about every 15 minutes to keep the bottom from scorching.
  2. Use tongs to remove the onion pieces from the soup. Keep the garlic in the pot if desired.
  3. Blend the soup with an immersion blender until it reaches your preferred smooth texture. Taste and adjust as needed; thin with milk, water, broth, or cream if you want a looser consistency.
  4. Serve the tomato soup with your preferred accompaniment such as garlic bread, grilled cheese, croutons, crackers, or pesto.

Notes

To prepare this in the Instant Pot, add all ingredients to the pot, cook for 20 minutes, then release the pressure. Remove the onion pieces and blend the soup. This method requires less active attention, while the stovetop version may develop a slightly sweeter and richer flavor from additional caramelization. Both methods produce excellent results.