One-Pot Breakfast Casserole Muffins

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These savory breakfast casserole muffins combine eggs, cheese, and a medley of fresh vegetables in a single dish. Easily prepared in one bowl and baked to golden perfection, they offer a convenient, portable option for any meal of the day. Customize with bacon or sausage for extra protein or keep vegetarian by adding extra veggies. Ideal for meal prepping, they store well refrigerated or frozen and reheat quickly without losing flavor.

Updated on Wed, 19 Nov 2025 16:42:00 GMT
One-Pot Breakfast Casserole Muffins, golden brown and cheesy, are perfect for grab-and-go mornings. Pin It
One-Pot Breakfast Casserole Muffins, golden brown and cheesy, are perfect for grab-and-go mornings. | platefullyjoy.com

Savory portable breakfast muffins packed with eggs cheese and veggies are perfect for meal prep budgetfriendly and delicious hot or cold.

I first made these muffins for a hectic workweek wanting a filling breakfast I could grab and go. They quickly became a favorite for both busy mornings and lazy weekends.

Ingredients

  • Eggs: 8 large
  • Milk: 13 cup whole milk (or dairyfree alternative)
  • Baby spinach: 1 cup chopped
  • Red bell pepper: 12 cup diced
  • Onion: 12 cup finely chopped
  • Bacon or breakfast sausage: 34 cup cooked crumbled (omit for vegetarian)
  • Cheddar cheese: 1 cup shredded (or Monterey Jack)
  • Salt: 12 teaspoon
  • Black pepper: 14 teaspoon
  • Smoked paprika: 14 teaspoon
  • Olive oil or nonstick spray: 1 tablespoon (for greasing muffin tin)

Instructions

Prep oven and pan:
Preheat oven to 350°F (175°C). Grease a 12cup muffin tin with olive oil or nonstick spray.
Whisk eggs and milk:
In a large bowl whisk together eggs and milk until fully combined.
Add mixins:
Stir in spinach bell pepper onion cooked bacon or sausage (if using) cheese salt black pepper and smoked paprika.
Portion mixture:
Divide the mixture evenly among the 12 muffin cups filling each about 34 full.
Bake muffins:
Bake for 2225 minutes or until muffins are set and lightly golden.
Cool and serve:
Cool in the tin for 5 minutes then run a knife around the edges and remove muffins. Serve warm or allow to cool completely for storage.
Sizzling One-Pot Breakfast Casserole Muffins filled with spinach and cheese, ready for a delicious bite. Pin It
Sizzling One-Pot Breakfast Casserole Muffins filled with spinach and cheese, ready for a delicious bite. | platefullyjoy.com

My kids love customizing their muffins with their favorite veggies and cheese. We bake a batch together every Sunday so everyone starts the week with a breakfast they helped make.

Nutrition Facts

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

Allergen Information

Contains eggs milk cheese. For dairyfree use plantbased milk and cheese. May contain pork if using bacon or sausage.

Variations & Add-Ins

Omit bacon or sausage for vegetarian muffins add mushrooms or zucchini or try swapping cheeses for different flavors.

Visualize hearty One-Pot Breakfast Casserole Muffins steaming, packed with vegetables, bacon, and fluffy eggs. Pin It
Visualize hearty One-Pot Breakfast Casserole Muffins steaming, packed with vegetables, bacon, and fluffy eggs. | platefullyjoy.com

Enjoy these versatile muffins fresh out of the oven or stash a few in the freezer for busy mornings. They are perfect for customizing and sharing with the whole family.

Recipe FAQs

Can I make these muffins vegetarian?

Yes, simply omit the bacon or sausage and add extra vegetables like mushrooms or zucchini for added flavor and texture.

How long can the muffins be stored?

Store in the refrigerator for up to 4 days or freeze for up to 2 months. Reheat in an oven or microwave before serving.

Can I use dairy-free alternatives for milk and cheese?

Absolutely, plant-based milk and dairy-free shredded cheese work well and keep the muffins suitable for dairy-sensitive diets.

What is the best way to prepare the muffins for meal prep?

Bake the muffins, let them cool completely, then store them in an airtight container in the fridge or freezer. Reheat individually as needed.

Can fresh herbs be added for extra flavor?

Yes, fresh herbs such as chives, parsley, or dill can be stirred into the batter to enhance the flavor profile.

One-Pot Breakfast Casserole Muffins

Savory muffins filled with eggs, cheese, and fresh veggies, ideal for easy meal prep or on-the-go.

Time to Prep
15 minutes
Time to Cook
25 minutes
Overall Time
40 minutes
Recipe by Olivia Reed


Skill Level Easy

Cuisine American

Makes 12 Number of Servings

Diet Info Vegetarian-Friendly, No Gluten, Low Carb

What You'll Need

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 (omit for vegetarian)

Cheese

01 1 cup shredded cheddar cheese or Monterey Jack

Seasonings

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

Oils

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

Step-by-Step Guide

Step 01

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

Step 02

Combine base ingredients: In a large bowl, whisk together eggs and milk until fully blended.

Step 03

Add vegetables, protein, cheese, and seasonings: Stir in chopped spinach, diced bell pepper, finely chopped onion, cooked bacon or sausage if using, shredded cheese, salt, black pepper, and smoked paprika.

Step 04

Portion mixture into muffin tin: Divide the mixture evenly among the 12 muffin cups, filling each about three-quarters full.

Step 05

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

Step 06

Cool and remove from tin: Allow muffins to cool in the tin for 5 minutes, then run a knife around the edges to release and remove. Serve warm or cool completely before storing.

Tools You'll Need

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

Allergy Notice

Be sure to review ingredients for allergens. When unsure, talk with a healthcare provider.
  • Contains eggs and dairy (milk and cheese).
  • May contain pork if bacon or sausage is used.
  • For dairy-free preparation, substitute plant-based milk and cheese.

Nutrition (For Each Serving)

Nutritional details are meant for general guidance. Don't rely on them for medical reasons.
  • Calorie Count: 130
  • Fats: 9 g
  • Carbohydrates: 2 g
  • Proteins: 9 g