One-Pot Breakfast Casserole Muffins

Featured in: Classic American Desserts

This dish features savory, handheld muffins combining eggs, cheese, and fresh vegetables baked in a single pan. They're quick to prepare, perfect for meal prep, and can be enjoyed warm or cold. Versatile with optional bacon or sausage, these muffins suit various diets including vegetarian by simply omitting meats and adding extra veggies. Ideal for busy mornings, they freeze and reheat well, offering a convenient and tasty breakfast alternative.

Updated on Wed, 19 Nov 2025 12:13:00 GMT
Golden-brown One-Pot Breakfast Casserole Muffins, packed with cheese, veggies, and savory bacon crumbles. Save
Golden-brown One-Pot Breakfast Casserole Muffins, packed with cheese, veggies, and savory bacon crumbles. | epicurestates.com

Savory, portable breakfast muffins packed with eggs, cheese, and veggies are perfect for meal prep, budget-friendly, and delicious hot or cold. Enjoy them any time of day as a satisfying breakfast or snack.

I whipped up these breakfast casserole muffins for my family on a busy weekend morning and they disappeared in record time. They’ve become my go-to when I want something substantial and tasty without a lot of fuss.

Ingredients

  • Large eggs: Use 8 for a fluffy base.
  • Whole milk (or dairy-free alternative): Adds richness and moisture to the muffins.
  • Baby spinach (chopped): 1 cup gives nutrients and color.
  • Red bell pepper (diced): 1/2 cup for flavor and crunch.
  • Onion (finely chopped): 1/2 cup for sweet savoriness.
  • Cooked bacon or breakfast sausage (crumbled, optional): 3/4 cup for protein, or omit for vegetarian.
  • Shredded cheddar cheese (or Monterey Jack): 1 cup provides melty goodness.
  • Salt: 1/2 teaspoon enhances all flavors.
  • Black pepper: 1/4 teaspoon for subtle heat.
  • Smoked paprika: 1/4 teaspoon adds a hint of smokiness.
  • Olive oil or nonstick spray: 1 tablespoon, for greasing the muffin tin and easy removal.

Instructions

Prepare the oven and pan:
Preheat oven to 350°F (175°C). Grease a 12-cup muffin tin with olive oil or nonstick spray.
Mix the base:
In a large bowl, whisk together the eggs and milk until fully combined.
Add vegetables and fillings:
Stir in the spinach, bell pepper, onion, cooked bacon or sausage (if using), cheese, salt, black pepper, and smoked paprika.
Divide mixture:
Evenly spoon the mixture into the prepared muffin cups, filling each about 3/4 full.
Bake:
Bake for 22–25 minutes until set and lightly golden.
Cool and serve:
Cool in the tin for 5 minutes, then run a knife around each muffin and remove. Serve warm or allow to cool completely for storage.
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| epicurestates.com

My kids love helping me whisk the eggs and add their favorite veggies, making these muffins a fun family kitchen activity. They're always excited to pack the leftovers in their lunchboxes.

Required Tools

You’ll need a 12-cup muffin tin, a mixing bowl, whisk, knife, cutting board, and an oven to prepare these muffins.

Allergen Information

Contains eggs, milk, and cheese. Pork may be present if using bacon or sausage. Use plant-based milk and cheese for a dairy-free option and always check ingredient labels.

Nutritional Information

Each muffin with bacon and cheddar is about 130 calories, 9 g fat, 2 g carbohydrates, and 9 g protein.

Perfectly baked One-Pot Breakfast Casserole Muffins: fluffy egg bites filled with colorful peppers and melted cheddar. Save
Perfectly baked One-Pot Breakfast Casserole Muffins: fluffy egg bites filled with colorful peppers and melted cheddar. | epicurestates.com

Enjoy these breakfast casserole muffins fresh from the oven or pack them for a nutritious snack. They’re sure to become a staple in your weekly meal prep!

Recipe FAQs

Can I make these muffins vegetarian?

Yes, simply omit the bacon or sausage and consider adding additional vegetables like mushrooms or zucchini for extra flavor.

Are these muffins suitable for meal prep?

Absolutely, they store well in the refrigerator for up to 4 days and can be frozen for 2 months for convenient reheating.

Can I use dairy-free milk and cheese?

Yes, plant-based milk and cheese alternatives can be used to accommodate dairy-free preferences.

What tools are needed to prepare these muffins?

You’ll need a 12-cup muffin tin, mixing bowl, whisk, knife, cutting board, and an oven.

How do I ensure the muffins are fully cooked?

Bake at 350°F (175°C) for 22–25 minutes until muffins are set and lightly golden on top.

One-Pot Breakfast Casserole Muffins

Portable, savory muffins with eggs, cheese, and veggies for easy, flavorful breakfast options.

Prep duration
15 min
Cook duration
25 min
Complete duration
40 min


Complexity Easy

Heritage American

Output 12 Portions

Dietary considerations No gluten, Low-Carbohydrate

Components

Base

01 8 large eggs
02 1/3 cup whole milk or dairy-free alternative

Vegetables

01 1 cup chopped baby spinach
02 1/2 cup diced red bell pepper
03 1/2 cup finely chopped onion

Protein (optional)

01 3/4 cup cooked bacon or breakfast sausage, crumbled

Cheese

01 1 cup shredded cheddar cheese or Monterey Jack

Seasonings

01 1/2 teaspoon salt
02 1/4 teaspoon black pepper
03 1/4 teaspoon smoked paprika

Oils

01 1 tablespoon olive oil or nonstick spray, for greasing muffin tin

Directions

Phase 01

Preheat and prepare pan: Preheat oven to 350°F (175°C). Grease a 12-cup muffin tin with olive oil or nonstick spray.

Phase 02

Combine wet ingredients: Whisk eggs and milk together in a large bowl until thoroughly combined.

Phase 03

Mix in vegetables, protein, and cheese: Fold in chopped spinach, diced bell pepper, chopped onion, crumbled cooked bacon or sausage if using, shredded cheese, salt, black pepper, and smoked paprika.

Phase 04

Portion mixture: Divide the mixture evenly into the muffin cups, filling each about three-quarters full.

Phase 05

Bake muffins: Bake for 22 to 25 minutes until muffins are set and lightly golden on top.

Phase 06

Cool and serve: Allow muffins to cool in the pan for 5 minutes, then loosen edges with a knife and remove. Serve warm or cool completely before storing.

Necessary tools

  • 12-cup muffin tin
  • Mixing bowl
  • Whisk
  • Knife and cutting board
  • Oven

Allergy details

Review each component for potential allergens and consult with healthcare professionals if you're uncertain.
  • Contains eggs and dairy; may contain pork if bacon or sausage is used.

Nutritional information (each portion)

These values are offered as a general guide and shouldn't replace professional medical guidance.
  • Energy: 130
  • Fat: 9 g
  • Carbohydrates: 2 g
  • Protein: 9 g