Easy Homemade Sugar Free Pasta Sauce Recipe

a bowl of spaghetti with sugar free spaghetti sauce

Easy Homemade Sugar Free Pasta Sauce Recipe

This is one of the best sugar free pasta sauce recipes you'll ever taste. It's loaded with fresh tomatoes, basil, and Italian flavors. A low-carb, keto-friendly sauce perfect for pasta!

Course condiment, Main Course

Cuisine American, Italian

Diet Vegan

Keyword sugar free pasta sauce recipes

Prep Time 25

Cook Time 20

Total Time 45

Servings servings

Calories 98kcal

Author Cindy Newland with Intentionally Eat

Ingredients

3 pounds tomatoes
2 Italian peppers or bell peppers
1 Tbsp olive oil
4 garlic cloves, minced or 1 Tablespoon garlic powder
1 Tbsp onion powder
1 Tbsp Italian Seasoning or this Copycat McCormick Spaghetti Seasoning Recipe
1 tsp sea salt or this Homemade Salt Substitute
1 tsp black pepper

Optional

1 tsp smoked paprika
1 tsp red wine vinegar or balsamic vinegar
1 tsp red pepper flakes
2 tbsp fresh basil, chopped

Get Recipe Ingredients

Instructions

Step 1: Prep the Tomatoes and Peppers. Preheat oven to 400°F. Wash and dry the tomatoes and peppers. Cut them in half (or quarters if large) and place cut-side up on a baking sheet. Drizzle with half of the olive oil and sprinkle with salt and black pepper. Roast 20-25 minutes or until soft, caramelized around the edges, and aromatic.
Step 2: Sauté the Garlic. In a large saucepan, heat the remaining olive oil over medium heat. Cook the garlic until fragrant, about 1–2 minutes.
Step 3: Build the Sauce. Add the roasted tomatoes and peppers to the saucepan. Stir in Italian seasoning, onion powder, and smoked paprika, and red pepper flakes if using.
Step 4: Simmer and Season. Bring the sauce to a gentle boil, then reduce the heat and simmer for 20–30 minutes until thickened. Use a stick blender to make a smoother sauce if desired.
Optional: Taste and add red wine or balsamic vinegar if desired. Stir in fresh basil just before serving.

Notes

Nutritional Information is only an estimate. The accuracy of this recipe may differ depending on the ingredients you use.

How to Store

Refrigerate: Store in an airtight container for up to 5 days.

Freeze:

Cool completely before freezing.
Portion: Use ice cube trays for single servings or freezer bags/containers for larger batches.
Packaging: Press bags flat to save space; leave headspace in containers.
Label & Date: Lasts 3–4 months in the freezer.

Thaw: For best flavor, thaw overnight in the fridge.

Pro Tip: Add fresh herbs after reheating—frozen herbs can darken.

Ways to Serve Your Healthy Homemade Spaghetti Sauce

Toss with low-carb pasta or zucchini noodles for a low carb spaghetti sauce option.
Spoon over spaghetti squash for another veggie-friendly choice.
Pair with traditional pasta if you’re cooking for the whole family.
Use as a base for lasagna, stuffed peppers, or this incredible pizza.

Tips

Don't skip roasting the tomatoes and peppers. It adds incredible flavor to your sugar-free tomato sauce and makes it taste like it’s been simmering all day!

Add the red wine vinegar or balsamic vinegar, since this is a sugar free pasta sauce it can help round out sharpness and makes other flavors pop.

Nutrition