Egg White Breakfast Cups (37 Calories, High Protein)

I make a tray of these on Sunday and breakfast is handled through Wednesday without a single decision.

Twelve cups, one muffin tin, about 35 minutes start to finish — and at 37 calories each with real protein from egg whites and feta, they’re the breakfast I come back to when I want to eat well without spending the morning on it or the money on it.

The mistake I made for a long time was underfilling them.

Egg whites rise dramatically in the oven and then settle as they cool, so a cup filled two-thirds of the way comes out looking sunken and sad.

Fill them almost to the rim. They’ll dome high, they’ll deflate a little, and they’ll settle level — which is what you want when you’re eating them cold out of the fridge three days later.

How to Make Egg White Breakfast Cups

The whole method is layering vegetables into a muffin tin and pouring egg whites over them. The order matters more than you’d think.

• Preheat the oven to 350°F (175°C) and spray a 12-cup muffin tin generously, including the top surface between the cups. Egg whites stick harder than whole eggs — this is not a step to do lightly.
• Whisk the egg whites with the garlic powder and black pepper. Egg whites are mild on their own, and seasoning the liquid rather than the tops means every bite gets some.
• Divide the chopped spinach, roasted red pepper and olives among the twelve cups. Push them down so they sit flat rather than sticking up.
• Pour the egg whites over the vegetables, filling each cup almost to the rim.
• Scatter the feta, green onion and parsley over the top rather than stirring them in, so they stay visible and don’t sink.
• Bake 25 to 30 minutes, until the cups have risen well above the tin and the tops are set and lightly golden.
• They should not wobble when you nudge the pan.
• Cool in the tin for 5 minutes before removing. Run a thin knife around the edge of any that resist.

The Protein and Calorie Numbers

Each cup comes in at 37 calories with about 5 grams of protein, which is what makes these easy to build a day around. Two cups is a light breakfast at roughly 75 calories and 10 grams of protein. Three is a proper one at about 110 calories and 15 grams — less than a single slice of toast with butter, and considerably more useful.

The protein comes from the egg whites and the feta, not from anything added. Two cups of liquid egg whites carry around 50 grams of protein on their own, and the quarter cup of feta adds a few more. If you’re training and want breakfast to actually count toward the day’s protein without sitting heavy before a session, this is the format I use.

For a bigger number, eat them alongside Greek yogurt or cottage cheese rather than changing the recipe. Adding more feta pushes the calories and salt up faster than it pushes the protein.

Meal Prep and the Weekly Plan

One tray is twelve cups, which is three breakfasts at three cups each, or six at two. I bake them Sunday afternoon while something else is in the oven and they’re the first thing I reach for on the mornings when I’d otherwise skip breakfast or eat something worse.

They also make the rest of the week easier to plan around, because breakfast stops being a variable. If you’re tracking calories, twelve identical cups at a known number is far less work than logging something different every morning. And if the goal is simply not standing in the kitchen at 7am, that’s handled too.

Scale it by baking two trays at once if you have two tins — the bake time doesn’t change, and you’ve covered a full week for two people in the same 35 minutes.

What They Cost

A batch of twelve runs on egg whites, a bag of spinach, a jar of roasted peppers, a small block of feta and a couple of green onions. Split twelve ways it comes to well under a dollar a cup, and most of the ingredients are things that keep — the peppers and feta sit in the fridge for weeks, so the marginal cost of the next batch is lower still.

Compare that to sous vide egg bites from a coffee shop, which run around five dollars for two. Three home cups cost less than one bought one. That gap is the reason this recipe has outlasted every trend I’ve made for the blog.

Two ways to bring it down further: buy whole eggs and separate them yourself rather than paying for cartoned whites (you get yolks for something else, so nothing is wasted), and use frozen spinach, which is cheaper than fresh and doesn’t wilt in the fridge before you get to it.

I could have added sautéed mushrooms, but I felt that there are already too many ingredients in these mini breakfast cups. Feel free to add mushrooms, if you’d like.

I eat eggs pretty much every day. Most of the time for breakfast, but also for lunch and dinner. There are so many things you can cook with eggs.

Using Frozen Spinach

Fresh baby spinach is what I use most of the time, but I made this batch with frozen because that’s what was in the freezer, and it works — with one condition.

Thaw it completely and squeeze it dry, hard, the way you would for spinach pie.

Frozen spinach holds a surprising amount of water, and if it goes in wet you get a layer of liquid at the bottom of every cup and eggs that never properly set.

Use about 5 oz (150 g) frozen leaf spinach in place of the 2 cups fresh. Squeezed out, it reduces to roughly the same volume.

Chopped frozen spinach works too, though the texture is finer and it distributes more evenly through the egg than fresh does.

Tips

Bake on the day you shop. Spinach is the ingredient that goes first, so making these the day the vegetables come home is what stops half a bag going to waste.

Spray the tin more than feels necessary. Egg whites have no fat in them, so nothing is helping you here. I spray, then wipe a finger around each cup to make sure the sides are actually coated. Silicone muffin liners work if you have them.

Squeeze the roasted peppers dry too. Jarred roasted red peppers carry brine, and that liquid ends up in the bottom of the cup. Pat them on a paper towel before chopping.

Go easy on salt or skip it. Feta and olives are both salty, and egg whites carry salt more sharply than whole eggs do. I don’t add any — the garlic powder and pepper do the seasoning instead.

Season the liquid, not the tops. A quarter teaspoon of garlic powder whisked into the egg whites reaches every cup evenly. Sprinkled on top it sits on two of them.

Expect them to deflate. They puff high in the oven and settle within a few minutes of coming out. That’s normal and not a sign anything went wrong.

Let them cool before refrigerating. Warm cups in a sealed container create condensation, and condensation makes them rubbery by the next morning.

Storing and Reheating

These keep in the fridge for up to a week in an airtight container, which is the whole point of making twelve at once. I eat them cold more often than not — they’re good that way, firm and savory, no reheating required, and portable if breakfast is happening somewhere other than the kitchen.

If you want them warm, 30 to 40 seconds in the microwave is enough. Longer and the egg whites tighten and go squeaky. They also freeze: lay them flat in a bag with parchment between layers, and thaw overnight in the fridge rather than microwaving from frozen.

More Breakfast Recipes

If you like this format but want more protein per cup, savory cottage cheese egg muffins use the same tin and the same meal-prep logic with a softer texture and a higher protein count. When you’d rather cook one serving fresh than prep a tray, spinach and feta omelette uses nearly the same flavors in a pan in five minutes. And cabbage frittata is the cheap one-pan version for when you’re feeding several people at once.

FAQ

How much protein is in egg white breakfast cups?

About 5 grams per cup, so three cups gives you roughly 15 grams for around 110 calories. It comes from the egg whites and feta rather than any added powder, which is why the calorie number stays low — egg whites are close to pure protein. If you need a bigger breakfast, eat them with Greek yogurt or cottage cheese on the side instead of doubling the feta, which adds fat and salt faster than protein.

How long do egg white breakfast cups last in the fridge?

A full week in an airtight container, which is longer than most egg muffins because there are no yolks to go sulfurous. I make twelve on Sunday and the last ones on Friday taste the same as the first. Let them cool completely before they go in the container — sealing them warm traps steam and makes them rubbery overnight.

Why do my egg white cups stick to the muffin tin?

Almost always underspraying. Egg whites contain no fat at all, so unlike whole-egg muffins they have nothing of their own to release with, and a light mist isn’t enough. Spray generously, then run a finger around the inside of each cup to spread it. If they still stick, silicone liners solve it permanently.

Can I use whole eggs instead of egg whites?

Yes — about 8 large eggs replaces the 2 cups of whites, and it’s cheaper if you’re buying cartoned whites. They’ll be richer, softer, and roughly triple the calories per cup, and they bake a few minutes faster, so start checking at 20 minutes. The trade-off is texture: whole-egg cups are more tender but don’t hold up as well after three days in the fridge.

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