One-Pot Breakfast Casserole Muffins

Featured in: Breakfast Boosts

These one-pot breakfast casserole muffins blend eggs, cheese, and fresh vegetables like spinach and bell pepper for a flavorful and convenient meal. With optional cooked bacon or sausage, they offer versatility for both vegetarian and meat options. Baked until golden and set, they can be enjoyed warm or cold, making them ideal for meal prepping busy mornings. Easy to make with pantry staples, these muffins deliver balanced nutrition and satisfying taste in a portable form.

Updated on Wed, 19 Nov 2025 16:46:00 GMT
Golden, cheesy one-pot breakfast casserole muffins with visible veggies and perfectly cooked edges are shown. Save
Golden, cheesy one-pot breakfast casserole muffins with visible veggies and perfectly cooked edges are shown. | tastybattle.com

Savory, portable breakfast muffins packed with eggs, cheese, and veggies—perfect for meal prep, budget-friendly, and delicious hot or cold.

When busy weekdays hit, these breakfast muffins are my secret weapon for keeping everyone well-fed and happy. I've made them countless times, tweaking ingredients based on what's on hand—and every batch disappears fast!

Ingredients

  • Base: 8 large eggs, 1/3 cup whole milk (or dairy-free alternative)
  • Vegetables: 1 cup baby spinach chopped, 1/2 cup red bell pepper diced, 1/2 cup onion finely chopped
  • Protein (optional): 3/4 cup cooked bacon or breakfast sausage crumbled (omit for vegetarian)
  • Cheese: 1 cup shredded cheddar cheese (or Monterey Jack)
  • Seasonings: 1/2 teaspoon salt, 1/4 teaspoon black pepper, 1/4 teaspoon smoked paprika
  • Oils: 1 tablespoon olive oil or nonstick spray (for greasing muffin tin)

Instructions

Prep Muffin Tin:
Preheat oven to 350°F (175°C). Grease a 12-cup muffin tin with olive oil or nonstick spray.
Mix Eggs and Milk:
In a large bowl, whisk together eggs and milk until fully combined.
Add Fillings:
Stir in spinach, bell pepper, onion, cooked bacon or sausage (if using), cheese, salt, black pepper, and smoked paprika.
Fill Tin:
Divide mixture evenly among the 12 muffin cups, filling each about 3/4 full.
Bake:
Bake for 22 to 25 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.
A hearty photo displaying fresh-baked one-pot breakfast casserole muffins, ideal for quick and easy breakfasts at home. Save
A hearty photo displaying fresh-baked one-pot breakfast casserole muffins, ideal for quick and easy breakfasts at home. | tastybattle.com

This recipe is a lifesaver for weekend brunches with the family. Everyone loves their own little muffin, and I love that clean-up takes less than 10 minutes.

Required Tools

You only need a standard 12-cup muffin tin, mixing bowl, whisk, knife and cutting board, plus your oven—simple and fuss-free.

Allergen Information

Contains eggs and dairy. For dairy-free, swap for plant-based alternatives and always check packaged ingredient labels carefully.

Nutritional Information

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

Savory and delicious, these one-pot breakfast casserole muffins are packed with bacon, cheese, and vegetables. Save
Savory and delicious, these one-pot breakfast casserole muffins are packed with bacon, cheese, and vegetables. | tastybattle.com

Try a batch this weekend—you'll love how easy, tasty, and versatile these muffins are!

Recipe Questions

Can I make these muffins vegetarian?

Yes, simply omit the bacon or sausage and add extra veggies like mushrooms or zucchini to keep the flavor and texture balanced.

How do I store and reheat the muffins?

Refrigerate for up to 4 days or freeze for 2 months. Reheat in the microwave or oven for best results.

What cheese works best in this casserole?

Cheddar or Monterey Jack cheeses provide a creamy, melty texture and rich flavor for these muffins.

Can I substitute dairy-free alternatives?

Yes, use plant-based milk and non-dairy cheese to make a dairy-free version without compromising taste.

What is the ideal cooking temperature and time?

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

One-Pot Breakfast Casserole Muffins

Savory eggs, cheese, and veggie muffins ideal for quick, portable meals and easy prep.

Prep duration
15 min
Cook duration
25 min
Complete duration
40 min
Created by Alex Ramirez


Skill level Easy

Heritage American

Output 12 Portions

Nutritional specifications Without gluten, Low-Carbohydrate

Components

Base

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

Vegetables

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

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

Directions

Phase 01

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

Phase 02

Combine Eggs and Milk: Whisk eggs and milk together in a large bowl until fully blended.

Phase 03

Incorporate Ingredients: Stir in chopped spinach, diced bell pepper, finely chopped onion, cooked bacon or sausage if using, shredded cheese, salt, black pepper, and smoked paprika until evenly distributed.

Phase 04

Distribute Mixture: Spoon the batter evenly into each muffin cup, filling about three-quarters full.

Phase 05

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

Phase 06

Cool and Serve: Let muffins cool in the tin for five minutes. Run a knife around edges to loosen 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 seek professional healthcare advice if uncertain.
  • Contains eggs, milk, and cheese dairy allergens
  • May contain pork if bacon or sausage is used

Nutrient breakdown (each portion)

These values are estimates only and shouldn't replace professional medical guidance.
  • Energy: 130
  • Fats: 9 g
  • Carbohydrates: 2 g
  • Proteins: 9 g