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Keto Pizza Sauce Recipe (Tomato Sauce or Marinara)

Keto Pizza Sauce Recipe (Tomato Sauce or Marinara)

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This keto pizza sauce recipe isn’t just great on your favorite fathead dough or cauliflower crust—it also doubles as a low-carb marinara sauce that’s perfect for your favorite “pasta” recipes!

Blended roasted red bell peppers and balsamic vinegar are the secret ingredients that give this sauce a subtle sweetness—making it ideal for pizza and other Italian classics like “spaghetti” puttanesca (made with zoodles instead of spaghetti noodles) or spicy “penne” alla vodka (made with yellow squash instead of penne pasta). Be sure to check out these recipes and other ideas below!

Fair warning: this recipe makes a pretty sizable batch of tomato sauce—so feel free to freeze half for use in future meals!

This sauce is delicious on more than just pizza! Give it a try with your favorite Italian recipes that call for a marinara or tomato sauce!

keto pizza sauce next to meatballs and pizza

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keto pizza sauce in a bowl next to pizza and a pan with meatballs

Keto Pizza Sauce Recipe (Tomato Sauce or Marinara)

  • Total Time: 40 mins
  • Yield: 8-9 cups sauce 1x


Simple and delicious keto pizza sauce recipe. Use this tomato sauce for pasta recipes like spicy, creamy marinara or “pasta” puttanesca (with zoodles).


  • 2 28-ounce cans crushed tomatoes (check for a low-carb brand)
  • 3 tablespoons extra virgin olive oil
  • 1 medium onion, finely diced
  • 2 garlic cloves, minced
  • 1 10-ounce jar roasted red bell peppers, pureed (optional)
  • 1 tablespoon balsamic vinegar
  • 1 tablespoon kosher salt (Diamond Crystal brand) or to taste
  • 1/2 teaspoon black pepper
  • 1/2 tablespoon dried oregano
  • 1/2 tablespoon dried basil


  1. Sweat the onion, garlic and spices in extra virgin olive oil for 5-8 minutes or until softened and translucent.
  2. Blend the roasted red bell peppers until smooth (if you decide to use them) then add to the onions and garlic along with the crushed tomatoes.
  3. Cover and simmer for at least 15 minutes (longer is even better) then serve, refrigerate or freeze.


Net carbs: 5g per 1/2 cup serving.

This recipe makes a decent-sized batch of tomato sauce, so feel free to freeze half to save for other recipes that call for marinara sauce!

  • Prep Time: 10 mins
  • Cook Time: 30 mins
  • Category: Dinner
  • Method: Simmering
  • Cuisine: Italian

Keywords: keto pizza sauce, keto tomato sauce, keto marinara sauce

Keto Pizza with Fathead Dough

This low-carb tomato sauce is perfect on your favorite keto pizza crust or flatbread recipe (or store-bought option). I used my go-to fathead dough (recipe below) and topped it with melty mozzarella and sliced leftover meatballs.

slice keto meatballs on fathead pizza crust with marinara sauce on the side

For a crispier crust, try cooking the dough in an oiled cast iron skillet or on top of an upside down, thick-bottomed pot (using parchment paper) in the oven.

“Spaghetti” Puttanesca (with Zoodles)

Spaghetti puttanesca is an Italian classic for a reason! The balance of richness from the tomato sauce, acid from the olives and “meatiness” from the anchovies are a truly delectable flavor combination! This recipe variation uses zucchini noodles as a low-carb alternative to regular spaghetti pasta, but you could some in any type of keto-friendly noodles that you’d like.

keto spaghetti puttanesca made with zucchini noodles

If you’re into briny, punchy flavors, then give this quick recipe a try (the amounts below serve one person, so just scale it up if you’re serving a crowd)! It’s a completely “riffable” recipe, so feel free to leave out any ingredients you don’t like or add in extra stuff like italian sausage or baby spinach! Here’s how to make it!

“Penne” Alla Vodka (with Yellow Squash)

Okay, so this recipe doesn’t actually have vodka in it (or penne pasta for that matter), but (in my defense) most penne alla vodka recipes don’t! What this recipe does have is a perfect balance of richness and spice—thanks to the addition of Parmesan and chili flakes!

keto penne alla vodka made with marinara and yellow squash

Squash “penne noodles” are the perfect alternative to traditional penne pasta. They’re quick to prep and have much more nutritional value that traditional wheat pasta. Here’s how to whip this dish up in no time (recipe below serves one person)!

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