Two or three times a year, Scott and I come to the slow realization that our eating habits need a bit of a reset. I’m sure many of you know how this is. You go from making oatmeal for breakfast each morning to picking up a bagel and cream cheese around the corner from work. The meals that include heaping portions of green vegetables become fewer. And ice cream goes from a once-in-a-while treat to a grocery list staple.
One of the best ways I’ve found for me to restore some reason to my eating habits is to spend a week or two actively increasing my greens and proteins and avoiding sweets, treats and anything made with flour. For those of you who like to put labels on such things, I guess you could call it a modified low carb diet.
As we all know, eating better takes a little bit of planning, particularly when you’ve fallen into a habit of the morning bagel from the neighborhood deli. For me to get out of that rut, I have to make something tasty that I can easily take to work with me and will keep me satiated for a few hours. And that is where these cute little egg cups come in.
I’ve been making these in various forms for years now (as this two year old Slashfood post attests). I used to make them in a six-cup muffin tin, but recent realized that I should apply the bake-in-jars trend to this savory breakfast item. It means I don’t have to transfer them to another container after baking and instead can just screw on a lid once they’ve cooled down. And you all know I how much I love to eat my breakfast from a jar.
Unfortunately, several of my wide mouth half pint jars were recently pressed into canning duty, so I didn’t have quite enough to go around and had to employ some vintage Fire King custard cups to serve as well (I have an embarrassing number of these as I can’t resist them when I find them for $.25 at thrift stores). Still, you get the idea.
A word to the wise here. If you decide to follow my example and bake eggs in jars or glass, please make sure to give your vessels a good greasing. I was in a hurry when I made these (it was past 11 pm on a Sunday night) and took the cheater’s way in the form of the Trader Joe’s version of Pam. However, when I have a bit more time to play with, I grease the cups with butter.
And a final note. The recipe below calls for onion and asparagus. That’s because that what’s in season right now. During the summer, I use spinach or shredded zucchini. Kale or chard is good. I’ve even used leftover brussels sprouts in these. It’s all good and it all works. Use your imagination and pick out a couple of vegetables that taste good to you.
On reheating: When it comes time to eat these, I do one of two things. I either pop them into the microwave for a minute or I eat them after they’ve sat at room temperature for 15-20 minutes, until they’ve lost their refrigerator chill. You can reheat them right in the jars. If you want to reheat them in the oven or toaster oven, I’d recommend starting them in a cold oven so as not to shock the glass.

Oven Baked Egg and Vegetable Cups
Ingredients
- 2 teaspoons olive oil
- 1/2 large onion
- 1 bundle of asparagus
- 10 eggs beaten
- 3/4 cup grated cheese I often use this opportunity to finish off any odds and ends
- salt and pepper.
Instructions
- Preheat oven to 375 degrees.
- Cut onion into thin half moons. Wash asparagus well (I’ve found that it’s been really gritty lately), trim the ends and cut into chunks of about 1/2 to 3/4 an inch.
- Heat oil in a large skillet and add onions. Cook until brown. Add asparagus and cook until tender crisp (about five minutes). Season with salt and pepper and set aside.
- Grease cups/jars. Using tongs, portion out the sauteed vegetables. The cups/jars should be mostly filled with vegetables.
- Beat eggs and evenly divide between the baking cups/jars. Top with approximately 1 tablespoon of cheese per serving. Using a fork or spoon, carefully stir the contents of each cup/jar so that the cheese isn’t just resting on top.
- Place the cups/jars on a baking sheet and bake for 20-25 minutes. When tops are browned, they are done.
- Remove from oven and let cool. If you used jars, you can put the lids on once they are cool enough to touch (the tops will be puffy and high just after baking, but like a souffle, they will fall). Store egg cups in the refrigerator until ready to eat. They will keep up to five days.






Can I do this without cheese? Son doesn’t eat cheese. Any other substitute like maybe a little milk. Sounds delicious. I’ll make mine with cheese.
I’ve never made them without cheese, but you’re welcome to try it.
you can also just put the veg in the jar , add a egg and micro for a min , nice hot egg !
Hi there,
Quick question my husband what’s to know could we use the full pint jars and add meat? If so should the meat be pre cooked? TIA
You probably don’t want to use full pint jars because the depth will be such that the eggs will have trouble cooking all the way through before the tops burn. You could add some cooked meat. I’ve done that in the past and it’s delicious.
Hi! I was so excited to come across this site! I’ve been trying to figure out how to bake egg casseroles for a week’s worth of breakfast. I went to my local grocery store to look for some mason jars. The direction said I need to pre-treat them in a pot of water first? Is that necessary? I’m afraid if I use these jars in the oven, it will break. Thanks!
Tried the larger canning wide mouth jar’s and made the necessary adjustments w/ingredience. Didn’t work out like hoped.
Tasty but it was like a failed souffle. I am going to stick with small jars.
BRILLIANT! I’m spending all day tomorrow working my share at the Gleaners group I belong to (which has been providing me with loads of produce that I’ve been making into jams btw. ) and stressing over the lack of an easy and portable meal to take with me. I think I’ll have to go make up one of these in a few minutes to pack for my lunch tomorrow, along with some crackers and the tomato jam I’m hooked on. My entire lunch will be out of jars that way! I’m going to have to cook it in the microwave though – it’s 100 degrees in the shade today and that oven is NOT getting turned on no matter what.