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Make pumpkin flatbread pizza with an easy pumpkin pizza sauce, caramelized onions, and spinach. It's an easy way to give a seasonal twist to pizza night.

When you hear "pumpkin pizza," you might think of roasted squash cubes. That's not what's happening here.
Creamy pumpkin pasta sauce stands in for marinara to give this pizza a subtle fall flair. We always make a big batch, so this pizza is ready in a flash.
Plus, the pumpkin alfredo-like sauce can be used for your favorite pasta dishes, too. But it's divine as a creamy, cheesy base for pizza.
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Ingredients
Here's what you need to make delicious pumpkin flatbread pizza:

Of special note:
- Flatbread or Pizza Dough - We used flatbread because it bakes quickly and also reduces the calorie count. Most any base will work, including spaghetti squash pizza crust.
- Caramelized Onions - The process to make these is discussed below.
- Spinach - Chopped kale and arugula are alternatives.
- Mozzarella Cheese - Havarti, fontina, and Gruyère would be nice too.
- Pumpkin Pizza Sauce - The ingredients to make it are shown below. You can often find this type of sauce in the grocery store in the cooler months.
For the pumpkin sauce, you will need the items pictured. Half and half or whole milk may be used instead of heavy cream if desired.

Please refer to the recipe card below for the full list of ingredients and detailed instructions.
Pumpkin Pizza Sauce Directions
This versatile pumpkin sauce works well in this recipe because it's smooth, just like traditional sauce. However, the consistency is a little thicker than a red sauce. If you want to thin it out, simply add a teaspoon of water. Taste test before adding more.
Here are the steps to make it:

- Heat olive oil over medium heat in a medium-sized saucepan. Add garlic and sauté for about 1 minute to soften.
- Add pumpkin puree, heavy cream, nutmeg, salt, and pepper to the pan.
- Whisk until smooth. Bring sauce to the point where it's just about to boil and then reduce heat to simmer and cook for about 4-5 minutes.
- Stir in Parmesan cheese.
Yield: 2 cups of sauce. Each serving is ⅓ of a cup.
Note: This recipe makes more sauce than you will need to make 4 servings.
Storage: Store pumpkin pizza sauce in a covered container in the refrigerator for 3-4 days or in the freezer for up to 3 months. Defrost overnight in the refrigerator.
Reheat: Sauce may be used hot or cold. Warm over medium-low heat on the stovetop, stirring to recombine ingredients.

How to Caramelize Onions
Caramelized onions pair perfectly with pumpkin in this recipe. The extra effort is totally worth it!
If you made a big batch of Slow Cooker Caramelized Onions, just defrost a portion for use in this recipe!
Otherwise, follow these steps to make them on the stovetop.

- Melt butter and olive oil in a large skillet.
- Add thinly sliced onions (about ⅛ inch in thickness) to the pan and coat with butter/oil mixture.
- Cook onions for 20-30 minutes over medium heat, stirring and scraping up brown bits every 3-5 minutes. The onions need undisturbed time so they can brown. But, they can't sit for too long because they will burn. If the pan becomes too dry, then add a teaspoon of water. Picture #3 is at 5 minutes.
- When the onions are browned to your liking, remove them from the pan. You can also deglaze the pan with a little balsamic vinegar or wine to add even more flavor.
Note: The best pan for this process is a cast iron skillet. But, onions can be caramelized in a non-stick skillet, which I used in the pictures.
How to Make Pumpkin Flatbread Pizza
Here's how to put it together.
But first, pre-cook the flatbread (or pizza dough.) We use Flatout Thin Pizza Crusts. The directions call for the crusts to bake at 375 °F for about 2 minutes!

- Spread pumpkin pizza sauce over the flatbread.
- Top with caramelized onions.
- Chop spinach into thin slices and sprinkle over the top.
- Easy way to julienne spinach: Stack 5-6 spinach leaves on top of each other, roll them long ways, and then cut them into thin slivers with a knife or kitchen shears.
- Sprinkle mozzarella cheese over the top and bake for about 5 minutes or until the cheese is melted.
Want more protein?
Customize pumpkin pizza with your favorite pizza toppings. I'm a fan of chicken sausage, nutritional yeast tofu, and pan-fried shrimp!

Would you like more easy, healthy, carb-conscious recipes?
📋 Recipe

Pumpkin Flatbread Pizza
Ingredients
Caramelized Onions
- 1 teaspoon butter
- 1 teaspoon olive oil
- 1 onion sliced about ⅛ inch (about 2 cups)
Pumpkin Pizza Sauce
- 1 Tablespoon olive oil
- 2 garlic cloves minced
- 1 cup pumpkin puree not pumpkin pie filling
- 1 cup heavy cream half and half or whole milk may be used
- ¼ teaspoon ground nutmeg
- ¼ teaspoon salt
- ¼ teaspoon pepper
- 2 Tablespoons Parmesan cheese grated
Pizza Assembly
- 4 slices flatbread may use pizza dough instead
- 1 ⅓ cups Pumpkin Pizza Sauce
- 1 cup baby spinach leaves stacked, rolled and cut into slivers
- 1 cup mozzarella cheese shredded
- ½ cup caramelized onion see directions above
Instructions
Caramelized Onions
- Melt butter and olive oil in a large skillet.
- Add thinly sliced onions to the pan and coat with butter/oil mixture.
- Cook onions for 20-30 minutes over medium heat, stirring and scraping up brown bits every 3-5 minutes. The onions need undisturbed time so they can brown. But, they can't sit for too long because they will burn. If the pan becomes too dry, then add a teaspoon of water.
- When the onions are browned to your liking, remove them from the pan. You can also deglaze the pan with a teaspoon of balsamic vinegar or wine to add even more flavor if desired.
Pumpkin Pizza Sauce
- Melt olive oil over medium-heat in a saucepan. Add garlic and sauté for about 1 minute to soften.
- Add pumpkin puree, heavy cream, nutmeg, salt, and pepper to the pan and whisk until smooth.
- Bring sauce to the point where it's just about to boil and then reduce heat to simmer and cook for about 4-5 minutes. Stir in Parmesan cheese.
Pumpkin Flatbread Pizza Assembly
- Preheat oven to 375 °F or according to directions for flatbread.
- Pre-bake flatbread according to instructions. (I pre-baked mine for 2 minutes at 375 °F.)
- Spread about ⅓ cup of Pumpkin Pizza Sauce over each slice of flatbread.
- Layer ¼ of the onions, spinach and mozzarella cheese over the sauce on each slice of flatbread.
- Return flatbread to the oven and cook for 4-5 minutes more or until cheese has melted.
Notes
- This recipe can be made with traditional pizza dough.
- Use one cup of Slow Cooker Caramelized Onion instead of making them scratch on serving day!
- Yield: 2 cups of sauce. Each serving is ⅓ of a cup.
- Note: This recipe makes more sauce than you will need to make 4 servings.
- Storage: Store sauce in a covered container in the refrigerator for 3-4 days or in the freezer for up to 3 months. Defrost overnight to the refrigerator.
- Reheat: Sauce may be used hot or cold. Warm over medium-low heat on the stovetop, stirring to recombine ingredients.
Nutrition
The recipe was originally published on 9/29/14 and has been updated to improve the reader experience.







Deb says
I have made this flatbread twice. I added more nutmeg to the pumpkin sauce and used goat cheese in the second round. Awesome changes! Definitely would recommend making this.
Marjory says
Love your changes! Thanks for sharing!
Stephanie Miller says
What a perfect Fall pizza night idea!! And I loved the tip for cutting the spinach into juliene strips!! Thanks!
Taryn says
Pumpkin pizza! This is my love language. lol. Great recipe!
christine says
This is such an amazing idea. I made a different pumpkin yogurt sauce last week and I think I could use up my saved sauce on a pizza like this. Awesome, thanks!