Roasted Butternut Squash Prosciutto Pizza with Caramelized Onions
This pizza is basically the autumn equivalent of finding a twenty-dollar bill in your old coat pocket – unexpectedly delightful and guaranteed to make your day better.

The combination of sweet, caramelized butternut squash with salty prosciutto creates the kind of flavor harmony that makes you question why you ever settled for plain pepperoni.

Picture this: tender cubes of roasted squash kissed with honey and sage, nestled on a bed of golden caramelized onions that took their sweet time getting perfect in apple cider.

The melted fontina and mozzarella create the perfect creamy backdrop, while those delicate pieces of prosciutto add just enough saltiness to make every bite absolutely irresistible.

This is the kind of pizza that makes your kitchen smell like a fancy Italian restaurant, and trust me, your neighbors are going to start asking very pointed questions about what you’re cooking over there.

Best part? Despite tasting like you hired a personal chef, this recipe is surprisingly straightforward – just a little patience for the caramelizing process and you’re golden.

Ingredients
For the Pizza Base
- 1 /2 pound pizza dough, at room temperature
- 2 tablespoons extra virgin olive oil (plus extra for drizzling)
For the Roasted Butternut Squash
- 4 cups cubed butternut squash or pumpkin
- 2 teaspoons honey
- 2 tablespoons chopped fresh sage
- 1 /2 teaspoon cinnamon
- 1 /2 teaspoon cayenne pepper (adjust to taste)
- 2 pinches crushed red pepper flakes
- Kosher salt and black pepper to taste
For the Caramelized Onions
- 2 tablespoons salted butter
- 2 yellow onions, thinly sliced
- 3 /4 cup apple cider
- Additional crushed red pepper flakes
- Salt and pepper to taste
For the Cheese and Toppings
- 1 cup shredded whole milk mozzarella
- 1 cup shredded fontina cheese
- 1 /4 cup crumbled blue cheese (optional)
- 3 ounces thinly sliced prosciutto, torn into pieces
Instructions
Preparation
- 1 Position the oven rack in the upper 1/3 position and preheat your oven to 425°F (220°C). If you have a baking stone, start preheating it now – this will give you an extra crispy crust that’s absolutely worth the wait.
- 2 Place the ball of pizza dough on a lightly oiled quarter sheet pan, ensuring the entire surface is coated to prevent sticking. Lightly drizzle extra virgin olive oil on top of the dough ball, cover with plastic wrap, and let it rest at room temperature. This resting period allows the gluten to relax, making the dough much easier to stretch without tearing.
Roasting the Butternut Squash
- 3 On a large baking sheet, toss together the 2 tablespoons olive oil, 4 cups cubed butternut squash, 2 teaspoons honey, 2 tablespoons chopped fresh sage, 1/2 teaspoon cinnamon, 1/2 teaspoon cayenne pepper, and a generous pinch each of crushed red pepper flakes, kosher salt, and black pepper. Make sure every cube is well-coated – the honey will help create beautiful caramelized edges. Roast for 15-20 minutes, until the squash is just fork-tender but not mushy, then remove from oven. Immediately increase the oven temperature to 500°F (260°C).
Caramelizing the Onions
- 4 While the squash roasts, start the onions in a large cast iron skillet or heavy-bottomed pan over medium-high heat. Melt the 2 tablespoons butter until it stops foaming, then add the thinly sliced onions. Cook for 3 minutes until they begin to soften and turn translucent. Add half the apple cider (about 1/3 cup), season generously with salt and pepper, and continue cooking for another 5 minutes until the cider has mostly evaporated and the onions are starting to turn golden. Add the remaining cider and cook for another 5 minutes or until the onions are deeply golden and caramelized with a jammy texture. Add a pinch of crushed red pepper flakes, cook for 1 more minute, then remove from heat.
Assembly and Baking
- 5 Remove the plastic wrap from your rested dough and gently press it with your fingertips (not a rolling pin) until it covers the entire sheet pan, working from the center outward. The dough should stretch easily – if it springs back, let it rest another 5 minutes. Drizzle the stretched dough lightly with olive oil, then evenly distribute the caramelized onions (you may have extra – save them for sandwiches!). Sprinkle both cheeses evenly, then distribute the torn prosciutto pieces, and finally arrange the roasted butternut squash on top, pressing gently into the cheese.
- 6 Slide the pizza into the preheated 500°F (260°C) oven and bake for 10 minutes. Rotate the pan 180 degrees for even browning, then bake another 3-5 minutes until the crust is golden brown and the cheese is bubbling and lightly browned in spots. The edges should sound hollow when tapped. Remove from oven, immediately sprinkle with additional crushed red pepper flakes, and let cool for 2-3 minutes before slicing to prevent the cheese from sliding off.
Recommended Equipment and Kitchen Tools
Essential Tools (for best results)
- Quarter sheet pan – The perfect size for this recipe and creates an ideal crust-to-topping ratio
- Large cast iron skillet – Superior heat retention for perfectly caramelized onions that won’t burn
- Sharp chef’s knife – Essential for uniformly slicing onions, which ensures even caramelization
- Large mixing bowls – Prevents butternut squash from flying everywhere when tossing with seasonings
Helpful Upgrades
- Kitchen scale – For perfectly portioned dough if you’re making it from scratch
- Mandoline slicer – Creates perfectly uniform onion slices that caramelize evenly, though a sharp knife works fine
- Silicone spatula – Makes transferring the sticky caramelized onions much easier
- Parchment paper – Line your squash roasting pan for easy cleanup
Nice-to-Have Options
Recipe Variations and Dietary Modifications
Gluten-Free Adaptation
- Replace regular pizza dough with 1/2 pound gluten-free pizza dough (store-bought works great)
- Allow extra 5-10 minutes resting time as gluten-free dough can be more delicate
- Handle more gently during stretching to prevent tearing
- May need an extra 2-3 minutes baking time for proper browning
Dairy-Free Modifications
- Substitute 2 cups cashew-based mozzarella or your favorite dairy-free cheese
- Replace butter with 2 tablespoons olive oil for caramelizing onions
- Skip the blue cheese or use dairy-free alternative
- Flavor may be slightly less rich, so add an extra pinch of salt
Vegan Version
- Use dairy-free cheese substitutions above
- Replace prosciutto with 1/2 cup toasted pine nuts or sliced mushrooms sautéed until crispy
- Add 1 tablespoon balsamic vinegar to onions for extra depth
- Consider sprinkling nutritional yeast for additional umami flavor
Low-Carb Alternative
- Replace pizza dough with large portobello mushroom caps or cauliflower crust
- Reduce butternut squash to 2 cups and add 1 cup roasted Brussels sprouts
- Increase cheese slightly to 1.5 cups total for better coverage
- Baking time may reduce to 8-12 minutes depending on base choice
Seasonal Variations
- Winter: Replace squash with roasted pears and add crumbled goat cheese
- Spring: Use asparagus and fresh peas with ricotta
- Summer: Try roasted zucchini and fresh basil
- Fall: Add roasted apples and substitute pancetta for prosciutto
Nutritional Information and Health Benefits
Key Nutritional Highlights
Health Benefits of Main Ingredients
Dietary Considerations
Smart Swaps and Ingredient Substitutions
Common Substitutions:
- Pizza dough → Pre-made naan, flatbread, or cauliflower crust (reduce baking time by 3-5 minutes)
- Butternut squash → Delicata squash, sweet potato cubes, or roasted pumpkin (same quantities)
- Fontina cheese → Gruyere, goat cheese, or sharp white cheddar (maintains creamy texture)
- Fresh sage → 1 tablespoon dried sage or fresh thyme (use half the amount)
Budget-Friendly Swaps:
- Prosciutto → Bacon bits, ham, or turkey pepperoni (about 1/2 cup chopped)
- Apple cider → White wine, chicken broth, or apple juice with 1 tsp vinegar
- Fontina cheese → Monterey Jack or provolone (similar melting properties)
- Fresh sage → Italian seasoning blend with extra dried sage
Pantry Emergency Substitutions:
- Butternut squash → Canned pumpkin puree mixed with roasted sweet potato for texture
- Yellow onions → Red onions, shallots, or leeks (white and light green parts only)
- Honey → Maple syrup, brown sugar, or agave (same quantity)
- Apple cider → Balsamic vinegar mixed with apple juice (2:1 ratio)
Pro Tips for Substitutions:
- Store leftover caramelized onions in the refrigerator for up to 5 days – perfect for sandwiches and omelets
- When using frozen butternut squash, thaw completely and pat dry to prevent soggy pizza
- Adjust cooking times by 2-3 minutes when using thinner crust alternatives

Make It Diabetes-Friendly
Carbohydrate Modifications:
- Replace regular pizza dough with cauliflower crust or portobello mushroom caps to reduce carbs from 35g to 8-12g per serving
- Reduce butternut squash to 2 cups and add 2 cups roasted zucchini or bell peppers (saves approximately 10g carbs per serving)
- Skip the honey or replace with sugar-free maple syrup (reduces 2g carbs per serving)
Portion & Timing Strategies:
- Recommended serving size: 1 slice with large mixed greens salad dressed in olive oil and vinegar
- Estimated carb content: Modified version contains approximately 15-20g net carbs per serving
- Pair with protein: Add 2-3 oz grilled chicken or extra prosciutto to slow carbohydrate absorption
- Meal timing: Best enjoyed as lunch or early dinner, allowing time for blood sugar management
Blood Sugar Management Tips:
- Load up on fiber: Add arugula or spinach as fresh toppings after baking
- Healthy fats boost: Drizzle with extra olive oil or add sliced avocado to slow glucose response
- Pre-meal strategy: Start with a small salad 10-15 minutes before eating pizza
Total Carb Reduction: Modified version reduces carbs by approximately 60% compared to traditional pizza, dropping from 35g to 15-20g net carbs per serving

Perfect Pairing Suggestions
Wine & Beverage Pairings
Side Dish Recommendations
Complete Meal Ideas
Occasion Suggestions
Pro Tips and Troubleshooting
Professional Techniques
Common Mistake Prevention
Storage and Make-Ahead Strategies
Scaling and Presentation

Roasted Butternut Squash Prosciutto Pizza with Caramelized Onions
Ingredients
For the Pizza Base
- 1/2 pound pizza dough, at room temperature
- 2 tablespoons extra virgin olive oil plus extra for drizzling
For the Roasted Butternut Squash
- 4 cups cubed butternut squash or pumpkin
- 2 teaspoons honey
- 2 tablespoons chopped fresh sage
- 1/2 teaspoon cinnamon
- 1/2 teaspoon cayenne pepper adjust to taste
- 2 pinches crushed red pepper flakes
- Kosher salt and black pepper to taste
For the Caramelized Onions
- 2 tablespoons salted butter
- 2 yellow onions, thinly sliced
- 3/4 cup apple cider
- Additional crushed red pepper flakes
- Salt and pepper to taste
For the Cheese and Toppings
- 1 cup shredded whole milk mozzarella
- 1 cup shredded fontina cheese
- 1/4 cup crumbled blue cheese optional
- 3 ounces thinly sliced prosciutto, torn into pieces
Instructions
Preparation
- Position the oven rack in the upper 1/3 position and preheat your oven to 425°F (220°C). If you have a baking stone, start preheating it now – this will give you an extra crispy crust that’s absolutely worth the wait.
- Place the ball of pizza dough on a lightly oiled quarter sheet pan, ensuring the entire surface is coated to prevent sticking. Lightly drizzle extra virgin olive oil on top of the dough ball, cover with plastic wrap, and let it rest at room temperature. This resting period allows the gluten to relax, making the dough much easier to stretch without tearing.
Roasting the Butternut Squash
- On a large baking sheet, toss together the 2 tablespoons olive oil, 4 cups cubed butternut squash, 2 teaspoons honey, 2 tablespoons chopped fresh sage, 1/2 teaspoon cinnamon, 1/2 teaspoon cayenne pepper, and a generous pinch each of crushed red pepper flakes, kosher salt, and black pepper. Make sure every cube is well-coated – the honey will help create beautiful caramelized edges. Roast for 15-20 minutes, until the squash is just fork-tender but not mushy, then remove from oven. Immediately increase the oven temperature to 500°F (260°C).
Caramelizing the Onions
- While the squash roasts, start the onions in a large cast iron skillet or heavy-bottomed pan over medium-high heat. Melt the 2 tablespoons butter until it stops foaming, then add the thinly sliced onions. Cook for 3 minutes until they begin to soften and turn translucent. Add half the apple cider (about 1/3 cup), season generously with salt and pepper, and continue cooking for another 5 minutes until the cider has mostly evaporated and the onions are starting to turn golden. Add the remaining cider and cook for another 5 minutes or until the onions are deeply golden and caramelized with a jammy texture. Add a pinch of crushed red pepper flakes, cook for 1 more minute, then remove from heat.
Assembly and Baking
- Remove the plastic wrap from your rested dough and gently press it with your fingertips (not a rolling pin) until it covers the entire sheet pan, working from the center outward. The dough should stretch easily – if it springs back, let it rest another 5 minutes. Drizzle the stretched dough lightly with olive oil, then evenly distribute the caramelized onions (you may have extra – save them for sandwiches!). Sprinkle both cheeses evenly, then distribute the torn prosciutto pieces, and finally arrange the roasted butternut squash on top, pressing gently into the cheese.
- Slide the pizza into the preheated 500°F (260°C) oven and bake for 10 minutes. Rotate the pan 180 degrees for even browning, then bake another 3-5 minutes until the crust is golden brown and the cheese is bubbling and lightly browned in spots. The edges should sound hollow when tapped. Remove from oven, immediately sprinkle with additional crushed red pepper flakes, and let cool for 2-3 minutes before slicing to prevent the cheese from sliding off.
