One-Pot Breakfast Casserole Muffins

Featured in: One-Pan Comforts

These one-pot breakfast muffins combine eggs, cheese, and fresh vegetables like spinach and bell pepper for a hearty start to your day. Optional cooked bacon or sausage adds savory richness, while simple seasonings bring balanced flavor. Baked in a muffin tin, they're portable and ideal for meal prep or on-the-go mornings. Vegetarian options are easy by omitting meat and adding more veggies. With just 40 minutes total time, these muffins can be enjoyed warm or cold and stored for convenience.

Updated on Wed, 19 Nov 2025 11:43:00 GMT
Golden-topped One-Pot Breakfast Casserole Muffins, packed with cheese and veggies, perfect for a grab-and-go breakfast. Save
Golden-topped One-Pot Breakfast Casserole Muffins, packed with cheese and veggies, perfect for a grab-and-go breakfast. | coraloven.com

Savory portable breakfast muffins packed with eggs cheese and veggies are perfect for meal prep budget-friendly and delicious whether hot or cold. Easy to whip up these muffins make busy mornings smoother and can suit a variety of diets.

When my family started busy school mornings I needed a grab-and-go breakfast. These casserole muffins became our favorite–they're a breeze to prepare and everyone loves switching up the fillings.

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 and grease:
Preheat oven to 350°F (175°C). Grease a 12-cup muffin tin using olive oil or nonstick spray.
Mix eggs and milk:
In a large bowl whisk together eggs and milk until smooth.
Add ingredients:
Stir in spinach bell pepper onion cooked bacon or sausage (if using) cheese salt black pepper and smoked paprika.
Divide batter:
Evenly portion mixture into muffin cups filling each about 3/4 full.
Bake:
Bake for 22 to 25 minutes until muffins are set and lightly golden.
Cool and serve:
Let muffins cool in tin for 5 minutes then run a knife around edges and remove. Serve warm or cool completely to store.
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| coraloven.com

Meal prep became fun after my kids started asking for these muffins weekly. Sitting together before heading out we'd pick our favorite fillings and make a batch for everyone.

Required Tools

12-cup muffin tin mixing bowl whisk knife and cutting board oven

Allergen Information

Contains eggs milk cheese may contain pork if using bacon/sausage; for dairy-free use plant-based milk and cheese always check ingredient labels

Nutritional Information

Per muffin with bacon and cheddar: 130 calories 9g fat 2g carbohydrates 9g protein

Fluffy, cheesy One-Pot Breakfast Casserole Muffins filled with spinach, red peppers, and savory bacon crumbles. Save
Fluffy, cheesy One-Pot Breakfast Casserole Muffins filled with spinach, red peppers, and savory bacon crumbles. | coraloven.com

Enjoy these muffins warm from the oven or chill for tasty results all week. They're a simple way to keep breakfast fresh and satisfying.

Recipe FAQs

Can I make these muffins vegetarian?

Yes, simply omit the cooked bacon or sausage and increase the amount of vegetables like mushrooms or zucchini for added texture and flavor.

How should I store leftovers?

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

What type of cheese works best?

Cheddar or Monterey Jack provide a melty, flavorful addition, but feel free to use your preferred shredded cheese.

Can I use dairy-free milk and cheese?

Yes, plant-based milk and dairy-free cheese alternatives work well for those avoiding dairy.

Is there a recommended seasoning blend?

Salt, black pepper, and smoked paprika balance the flavors beautifully while enhancing the savory elements.

One-Pot Breakfast Casserole Muffins

Savory breakfast muffins combining eggs, cheese, spinach, and optional bacon for easy, flavorful servings.

Prep time
15 minutes
Time to cook
25 minutes
Time Required
40 minutes
Created by Hannah Lewis


Skill level Easy

Cuisine American

Makes 12 Portions

Dietary details Meatless, No gluten, Reduced Carb

What You Need

Base

01 8 large eggs
02 80 ml whole milk or dairy-free alternative

Vegetables

01 30 g baby spinach, chopped
02 75 g red bell pepper, diced
03 60 g onion, finely chopped

Protein (optional)

01 85 g cooked bacon or breakfast sausage, crumbled

Cheese

01 115 g shredded cheddar cheese or Monterey Jack

Seasonings

01 0.5 teaspoon salt
02 0.25 teaspoon black pepper
03 0.25 teaspoon smoked paprika

Oils

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

How To Make

Step 01

Preheat and Prepare: Preheat the 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, and Cheese: Fold in chopped spinach, diced bell pepper, onion, crumbled cooked bacon or sausage if using, shredded cheese, salt, black pepper, and smoked paprika until evenly incorporated.

Step 04

Fill Muffin Cups: Divide the mixture evenly among the 12 muffin cups, filling each approximately three-quarters full.

Step 05

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

Step 06

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

Needed utensils

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

Allergy details

Check components for allergens, and get advice from a medical expert if you're unsure.
  • Contains eggs and dairy (milk, cheese).
  • May contain pork if bacon or sausage is included.
  • Use plant-based milk and cheese for dairy-free variations.

Nutrition Details (each serving)

Details are for informational purposes, not medical use.
  • Kilocalories: 130
  • Fat content: 9 g
  • Carbohydrates: 2 g
  • Proteins: 9 g