By Emma Hartley, Food EditorReviewed & updated July 2026
These spinach feta egg muffins are the meal-prepper's best friend: bake a batch on Sunday and grab two each morning for a warm, high-protein breakfast on the go. They've genuinely fixed my weekday breakfasts — no more skipping it or grabbing something sugary, just a warm savoury bite ready in the fridge. They're fluffy, savoury, and loaded with greens, with salty pops of feta in every bite.
Naturally low-carb and gluten-free, they reheat in under a minute and travel well — no fork required.
Skip ahead toCurated by Emma · 6 min readWhy you'll love this recipe
- High protein. About 6 grams per muffin to keep you full.
- Meal-prep hero. Make 12 at once for the whole week.
- Grab-and-go. Portable, low-carb, and reheatable.
The one step that decides soggy vs. fluffy: cook the spinach first
There's a single mistake that ruins egg muffins, and it's tossing raw spinach (or any watery vegetable) straight into the egg. Spinach is almost entirely water, and as it cooks in the oven it releases all of that liquid into your muffins, leaving them wet, dense, and prone to falling apart. The fix takes three minutes: sauté the spinach and green onions first until they wilt and the released water evaporates, then let them cool slightly before mixing in. This concentrates the flavour and keeps the egg muffins fluffy and structurally sound. The same rule applies to any add-in with water in it — mushrooms, tomatoes, zucchini, peppers should all be cooked down first. Drier add-ins like cooked bacon, ham, or hard cheese can go in raw. Master this one habit and your egg muffins come out tender and set every time instead of weeping liquid in the tin.
Tips for the best results
Sauté the spinach first to remove excess water, or your muffins will turn soggy. Grease the tin generously (or use silicone liners) so they release cleanly. And don't overfill — leave a little room because they puff as they bake.
Spinach Feta Egg Muffins
Fluffy, high-protein baked egg muffins with spinach and feta — perfect for meal prep.
☆☆☆☆☆
Ingredients
- 10 large eggs
- 1/4 cup milk
- 1/2 tsp salt
- 1/4 tsp black pepper
- 1 tbsp olive oil
- 4 cups fresh spinach, chopped
- 3 green onions, sliced
- 3/4 cup crumbled feta
- 1/4 tsp garlic powder
Instructions
- Step 1. Preheat the oven to 375°F (190°C) and grease a 12-cup muffin tin well.
- Step 2. Heat the olive oil in a skillet over medium heat and cook the spinach and green onions until wilted and any liquid evaporates, about 3 minutes. Let cool slightly.
- Step 3. In a large bowl, whisk the eggs, milk, salt, pepper, and garlic powder.
- Step 4. Divide the spinach mixture and feta among the muffin cups, then pour the egg mixture over to fill each about three-quarters full.
- Step 5. Bake 18-22 minutes until puffed and set in the center. Cool 5 minutes, then run a knife around the edges to release.
Storage, reheating, and clean release
For a full week of breakfasts, these store and reheat beautifully: keep them in an airtight container in the fridge for up to four days, or freeze for up to two months (freeze them in a single layer first, then bag them, so they don't stick together). To reheat, microwave 30–45 seconds from the fridge or about a minute from frozen — wrap one in a paper towel to catch condensation and keep it from going rubbery. One practical tip that saves a lot of frustration: grease the tin really well, or use silicone liners. Egg sticks ferociously to metal, and a properly greased tin (or flexible silicone cups you can pop from underneath) is the difference between muffins that lift out whole and ones that leave half their bottoms behind. Running a knife around each muffin's edge before lifting helps too.
Make it your own
Swap feta for cheddar or goat cheese, add diced bell pepper, cooked bacon, or sun-dried tomatoes (cook any watery veg first), or stir in a pinch of red pepper flakes. Use just egg whites for an even leaner version (use about 16 whites).
Frequently asked questions
How do I store them? Refrigerate up to 4 days in an airtight container, or freeze up to 2 months.
How do I reheat them? Microwave for 30–45 seconds from the fridge, or about 1 minute from frozen. Wrap in a paper towel to keep them from going rubbery.
Why did mine deflate? Egg muffins puff in the oven and settle as they cool — that's normal. Sautéing the veg first helps them hold their shape.
Why are my egg muffins watery? Raw watery vegetables (spinach, mushrooms, tomatoes) release liquid as they bake. Cook them down first to evaporate the water and your muffins will come out fluffy and set.
How do I keep them from sticking to the tin? Grease the cups very generously or use silicone liners, and run a knife around the edges before lifting. Egg sticks easily to bare metal.
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Further reading & trusted sources
From our test kitchen
These deflate as they cool, and that’s normal, not a fail. The real make-or-break is a well-greased tin or liners, because egg welds itself to bare metal.
Emma thinks a recipe has failed if it needs a long backstory before the ingredients — so hers get straight to the point, with the small technique notes that actually change how a dish turns out. She leads The Nourish Kitchen’s recipes and food guides, writing each one to work in a real, busy kitchen rather than a photo studio. AI tools help with research and drafting, and a human checks every recipe for clarity and food safety before it publishes. Nutrition figures are honest estimates, never guarantees.