Avoid skipping breakfast by making these healthy egg muffin cups in a muffin tin ahead of time. Perfect healthy breakfast meal prep idea! These egg muffin cups are easy to customize with anything from spinach, bell peppers, tomatoes, onions, cheese, fresh herbs, etc.
Preheat oven to 350ºF. Spray a nonstick muffin tin with nonstick cooking spray or melted coconut oil. Set aside.
Whisk the eggs in a bowl. Place 2-3 items from the list above into each tin. You can customize each muffin cup however you'd like! Pour the egg mixture on top, leaving 1/4" from the top.
Bake for 20 minutes, or until a toothpick comes out clean for each frittata. Remove from oven. Use a knife to go around the edges and pop out the egg cups.
To reheat, simply place one egg muffin in the microwave for 35-45 seconds on HIGH or until warm. Enjoy!
Keep them all in an airtight container in the refrigerator or place each individual egg muffin cup in a resealable bag for an easy grab-and-go breakfast. Dispose after 6 days. You can also freeze the cooked egg muffins, once cooled, in a resealable bag for up to 3 months.Please note: the calories below are for 1 egg without the add-ons since the recipe allows you to DIY these egg muffins.