Autumn Butternut Squash and Onion Frittata Recipe

This Autumn Butternut Squash and Onion Frittata combines sweet roasted squash, golden onions, sharp cheddar cheese, and fluffy eggs in one simple skillet dish. Baked until lightly golden, it’s hearty enough for breakfast, brunch, lunch, or a light dinner.

The roasted squash adds a touch of sweetness while the onions bring rich savory flavor. Finished with melted cheddar and fresh herbs, this frittata is easy to prepare and tastes just as good warm from the oven as it does the next day.

Why You’ll Love This Recipe

• Easy to Make: Simple ingredients and straightforward steps.
• Filling and Hearty: Eggs, cheese, and vegetables make a satisfying meal.
• Perfect for Brunch: A great addition to weekend breakfasts and holiday tables.
• Make Ahead Friendly: Easy to prepare in advance.
• Uses Seasonal Produce: A great way to enjoy butternut squash.
• Delicious Hot or Cold: Enjoy leftovers straight from the fridge or reheated.

Ingredient Guide and Substitutions

1. Butternut Squash: Sweet potatoes can be used for a similar texture and flavor.
2. Onions: Yellow onions work best, but red onions are also delicious.
3. Sharp Cheddar Cheese: Swap with Gruyère, Swiss, mozzarella, or feta.
4. Eggs: The base of the frittata and essential for structure.
5. Milk: Makes the eggs lighter and softer. Half-and-half can also be used.
6. Fresh Herbs: Thyme, sage, parsley, or chives all pair well with squash.

Autumn Butternut Squash and Onion Frittata

This hearty frittata combines roasted butternut squash, caramelized onions, and sharp cheddar baked into fluffy eggs, resulting in a golden, puffed dish with a tender center. It’s a simple, fuss-free breakfast or brunch option that highlights seasonal ingredients with a comforting, savory flavor and appealing appearance.

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Prep Time 15 minutes mins

Cook Time 40 minutes mins

Total Time 55 minutes mins

Course Main Course

Cuisine Comfort Food

Servings 4

Calories 250 kcal

Equipment

• 9-inch ovenproof skillet
• Mixing bowls
• Whisk
• Rubber spatula
• Sharp knife
• Cutting board
• Baking sheet

Ingredients

  

• 1 small butternut squash peeled and cubed
• 2 medium onions thinly sliced
• 3 cloves garlic minced
• 6 large eggs farm-fresh if possible
• 1/4 cup milk optional
• 1 cup sharp cheddar cheese grated
• 1 tablespoon olive oil for sautéing
• 1 tablespoon butter for greasing and finishing
• to taste salt and pepper adjust to preference
• 1 teaspoon fresh fresh thyme or sage chopped, optional

Instructions

 

• Preheat the oven and lightly grease a 9-inch ovenproof skillet with butter.
  
• Spread the butternut squash cubes on a baking sheet. Drizzle with olive oil and season with salt and black pepper.
  
• Roast the squash until tender and lightly caramelized around the edges. Remove from the oven and set aside.
  
• Heat olive oil in the prepared skillet over medium heat. Add the sliced onions and cook until soft and golden. Stir in the minced garlic and fresh thyme and cook until fragrant.
  
• In a large mixing bowl, whisk together the eggs, milk, salt, and black pepper until slightly frothy. Fold in the grated cheddar cheese and roasted butternut squash.
  
• Pour the egg mixture into the skillet over the caramelized onions, ensuring the squash and cheese are evenly distributed throughout.
  
• Cook briefly until the edges begin to set, then transfer the skillet to the oven and bake until the frittata is puffed, golden, and fully set in the center.
  
• Remove the skillet from the oven and allow the frittata to rest for several minutes. Sprinkle with fresh thyme before serving.
  
• Slice the frittata into wedges and serve warm.
  

Keyword breakfast, brunch, fall, vegetables

Nutrition Facts (Per Serving)

Helpful Tips for Success

• Roast the Squash Until Tender: Soft squash blends better into the eggs.
• Cook the Onions Slowly: This develops a sweeter flavor.
• Whisk the Eggs Well: Helps create a lighter texture.
• Don’t Overbake: Remove once the center is just set.
• Let It Rest Before Slicing: This makes cleaner slices.
• Use Freshly Grated Cheese: It melts more smoothly than pre-shredded cheese.

Delicious Variations You Should Try

1. Bacon and Cheddar: Add cooked bacon for extra flavor.
2. Spinach Version: Stir in fresh spinach before baking.
3. Mushroom Version: Add sautéed mushrooms with the onions.
4. Goat Cheese Version: Replace cheddar with creamy goat cheese.
5. Sausage Version: Add cooked breakfast sausage.
6. Herb Lover’s Version: Add extra thyme, sage, and parsley.

More Comfort Food Recipes to Enjoy

• Pumpkin Scones Recipe
• Roasted Pumpkin Ravioli Recipe
• Spooky Apple Walnut Salad Recipe
• Roasted Pumpkin Alfredo Pasta Recipe

Make-Ahead and Storage Tips

• Make Ahead: Bake the frittata a day in advance.
• Refrigerate Leftovers: Store in an airtight container for up to 4 days.
• Reheat Gently: Warm individual slices in the microwave or oven.
• Serve Cold: Great for packed lunches and brunch spreads.
• Freeze Portions: Wrap slices individually and freeze for up to 2 months.

FAQ’s

1. Do I need an oven-safe skillet?
   No. You can transfer the mixture to a greased baking dish before baking.
2. Can I use frozen butternut squash?
   Yes, thaw and pat it dry before roasting.
3. What cheese works best in a frittata?
   Cheddar, Gruyère, Swiss, feta, and goat cheese are all excellent options.
4. How do I know when the frittata is done?
   The center should be set and no longer jiggle when gently shaken.
5. Can I add extra vegetables?
   Absolutely. Mushrooms, spinach, kale, and bell peppers work well.