How to Cook Classic Italian Tomato Sauce
Master authentic Italian tomato sauce by gently sweating aromatics, crushing whole plum tomatoes, and slow-simmering until glossy, rich, and naturally sweet.
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🧰 Required Tools & Equipment
- ✓ Heavy-bottomed saucepan or Dutch oven
- ✓ Chef's knife
- ✓ Cutting board
- ✓ Wooden spoon
- ✓ Potato masher
📦 Materials & Supplies
- ✓ 28 oz can whole peeled San Marzano tomatoes
- ✓ 1 medium yellow onion (finely diced)
- ✓ 3 cloves fresh garlic (thinly sliced)
- ✓ 3 tbsp extra virgin olive oil
- ✓ Fresh basil sprigs
- ✓ Sea salt and freshly cracked black pepper
⚠️ Safety Checkpoints & Warnings
- • Keep heat low when adding garlic to prevent rapid burning and acrid smoke.
- • Use a splatter guard or keep the pot partially covered during simmering to prevent hot tomato spits.
- • Tuck fingers into a claw grip when dicing onions and slicing garlic.
📋 Step-by-Step Guide (6 Steps)
Prep the Aromatics
Finely dice one medium yellow onion into uniform 1/4-inch pieces. Peel and thinly slice or mince three cloves of fresh garlic. Keep the garlic and onions separated on the cutting board.
- • Even pile of diced translucent white onion
- • Paper-thin translucent garlic slices separated from onions
- • Dicing garlic too early and mixing it with onions before cooking
- • Uneven onion chunks causing irregular cooking
Sweat Onions and Garlic
Heat 3 tablespoons of extra virgin olive oil in a heavy-bottomed pot over medium-low heat. Add the diced onions with a pinch of salt and sweat for 6-8 minutes until soft and translucent. Add garlic and cook for 60 seconds until fragrant without letting it brown.
- • Soft, glossy, translucent onions without brown edges
- • Garlic turns opaque and releases strong aroma
- • Cooking on high heat and scorching the garlic
- • Rushing the onions before they turn soft and sweet
Add Tomatoes and Crush
Pour the whole canned tomatoes and their juices directly into the pot. Use a wooden spoon or potato masher to break apart the whole tomatoes into small, rustic chunks.
- • Thick, chunky red mixture with no whole tomatoes remaining
- • Steam rising as tomatoes incorporate with hot oil
- • Using an electric blender prematurely, which turns tomato seeds bitter and aerates the sauce orange
Season and Add Basil
Add 1/2 teaspoon of sea salt, a crack of black pepper, and 2 whole sprigs of fresh basil submerged beneath the surface. Swirl with the wooden spoon to combine.
- • Basil stems completely submerged under the red sauce
- • Uniform distribution of seasonings visible across the top
- • Chopping fresh basil into tiny pieces now, which will turn dark and slimy during a long simmer
Simmer and Reduce
Reduce the heat to low so the sauce gently lazily bubbles. Simmer partially covered for 30 to 40 minutes, stirring every 5-7 minutes to scrape the bottom and prevent sticking.
- • Deep brick-red color with an orange-tinged oily sheen forming on top
- • Sauce coats the back of a wooden spoon without running off like water
- • Leaving the pot unattended on high heat, burning the bottom layer
- • Covering fully, trapping steam and preventing proper reduction
Finish and Balance
Remove and discard the cooked basil stems using tongs. Taste the sauce; adjust salt and acidity with a tiny pinch of salt or a drop of olive oil if needed. Stir in freshly torn basil leaves right before serving.
- • Vibrant green torn basil pieces scattered through deep red glossy sauce
- • Smooth, thick ribbon texture when dripping from the spoon
- • Adding excessive white sugar before testing the natural sweetness of reduced tomatoes
Credit: inspired by an original tutorial by MasterChef World — watch the original on YouTube.
Don’t have everything?
- No San Marzano canned tomatoes? High-quality canned whole peeled plum tomatoes
- No Potato masher? The back of a solid wooden spoon or clean hands to crush tomatoes before adding to the pot
- No Dutch oven? Any heavy-bottomed stainless steel saucepan