Cauliflower & Cheddar Egg Bake
A cheesy baked casserole of cauliflower, eggs, and cheddar. A make-ahead, very-low-carb keto breakfast that reheats all week.
Why You'll Love This Recipe
An egg bake with riced cauliflower standing in where potato or bread would usually sit. Eight eggs, a cup of cheddar, and one head of cauliflower give you six squares that cut cleanly, reheat without turning rubbery, and cover breakfast for most of a working week. It is the kind of thing worth half an hour on a Sunday, because what you buy with that half hour is five mornings where breakfast already exists and needs eight minutes in a hot oven rather than a pan, a spatula, and standing over it.
Cook the cauliflower and onion first and let them cool before the eggs go in. Raw cauliflower releases its water as it bakes and leaves a wet layer sitting in the bottom of the dish, and the cooling matters as much as the cooking, since vegetables still hot from the pan will start to scramble the eggs the moment they meet. Spread them on a plate rather than leaving them heaped in the skillet and they will be ready by the time the oven is.
Eight eggs and a cup of cheddar make this one of the more protein-dense breakfasts here, with almost no starch in it. That is the reason a single square holds until lunch when a bowl of cereal the same size would not, and it is also why the pan is worth cutting into six rather than four. Cauliflower does the job bread or potato would usually do, adding bulk and something to chew without much behind it. If you would rather cook eggs in a pan than a dish, there is our Asparagus and Egg Spring Skillet.
Ingredients
- 1 medium head cauliflower, riced (about 4 cups)
- 8 large eggs
- 1 cup shredded cheddar
- 1/2 small onion, diced
- 1 tbsp olive oil
- 1/2 tsp fine sea salt
- black pepper
Instructions
- Heat the oven and grease the dish into the corners: Heat the oven to 375°F (190°C) and grease an eight by eight inch baking dish, or anything close to two quarts, corners included. Egg sticks to whatever it is baked against, and the corners are exactly where a spatula ends up fighting for the first square. Butter or oil worked in with a paper towel, up the sides as well as across the bottom, is all it takes; there is no need for parchment in a dish this shallow.
- Cook the water out of the cauliflower: Warm the olive oil in a large skillet over medium heat and cook the diced onion and the riced cauliflower together for about five minutes, stirring, until the cauliflower stops giving off steam and starts to smell nutty rather than raw. That steam is the water you do not want turning up in the eggs, and a head of cauliflower holds far more of it than it looks like it should. Spread the mixture on a plate to cool until it is barely warm to the back of your hand.
- Whisk the eggs, then fold the cauliflower in: Whisk the eggs with the salt and pepper in a large bowl until the color is even and no clear streaks of white are left. Stir in the cooled cauliflower and about three quarters of the cheddar, then pour it into the dish and spread it level. If the cauliflower is still hot it sets the egg on contact and you will see threads of cooked white in the bowl, which is the whole reason for cooling it. Scatter the rest of the cheese over the top.
- Bake until the center barely moves: Bake for twenty-five to thirty minutes. It is ready when the top is golden, the edges have puffed and pulled slightly from the sides, the cheese has browned in patches, and the center wobbles as one piece when you nudge the dish rather than rippling like liquid. A knife slid into the middle should come out clean. Egg goes from set to rubbery in a matter of minutes, so start checking at twenty-five rather than trusting the clock.
- Rest it ten minutes before the knife goes in: Let the bake sit in its dish for ten minutes out of the oven. Egg carries on cooking in the heat the dish is holding, so a bake pulled while the center still trembles finishes to just set on the counter instead of overcooking under the element. The rest also firms it enough to cut: go in straight away and the first square comes out as a scoop, while ten minutes later the knife leaves a clean edge.
Variations
- Dairy-free: the cheddar is the only dairy here, so swap in a firm dairy-free shred and add a tablespoon of nutritional yeast to the eggs to get some of the savory depth back.
- Add more protein: an extra egg or two, or a layer of crumbled cooked sausage under the cheese. Cook any meat first so it does not release water into the bake. The sausage adds meat.
- Add more vegetables: sauteed mushrooms, spinach, or roasted red pepper fold in well. Cook the water out of any of them first or the bake turns loose.
- Make it spicy: stir a diced jalapeno in with the onion and swap half the cheddar for pepper jack, which spreads the heat through the whole dish instead of leaving it on top.
- Change the cheese: gruyere makes it nuttier, feta crumbled in gives it a Mediterranean turn, and a mix of cheddar and parmesan browns more deeply on top. Feta and parmesan are both saltier than cheddar, so pull back on any added salt.
Storage & Leftovers
Cool the bake in its dish for about ten minutes, then cut it into squares before it goes into the refrigerator. Squares cool faster and reheat more evenly than a slab does, and cold egg bake tears under a knife instead of slicing. In an airtight container it keeps four days, and a paper towel laid underneath the pieces takes up the small amount of water eggs release as they sit.
Reheat a square in a 350°F (175°C) oven or a toaster oven for eight to ten minutes. A microwave does it in forty seconds and the eggs pay for the speed: the proteins tighten all at once, and reheated egg goes rubbery and squeaks against the fork. If the microwave is what you have, run it at half power and stop while the center is still slightly cool, then let it stand a minute.
This freezes better than most egg dishes, because the cauliflower and the cheese give it something to hold onto. Wrap the squares individually, freeze for up to two months, and thaw overnight in the refrigerator before reheating. Straight from frozen works as well, at 350°F (175°C) with foil over the top for the first fifteen minutes so the edges do not dry out while the middle is still thawing.
Notes & Tips
- Dry the cauliflower first: cook the riced cauliflower in the pan until it stops steaming. It holds far more water than you would guess, and that water ends up in the eggs.
- Let it cool before the eggs go in: if the cauliflower is still hot when you stir it into the whisked eggs, the edges start to scramble before the dish ever reaches the oven.
- Check the center, not the edges: the outside sets first, so the bake is done when the middle no longer wobbles when you nudge the dish.
- Rest before slicing: five minutes out of the oven lets the eggs firm up, and squares lift out clean instead of falling apart.
- Make it ahead: this bakes and reheats well, so make it on a Sunday, cut it into squares, and warm a piece in a low oven or a covered skillet through the week.
- Flexible swap: no onion? You can leave it out, or swap in a little chopped celery or chives.
Nutrition & Mindful Eating
- Eggs, cheddar and cauliflower each do a different job in this bake. The eggs set and bind, the cheddar melts into pockets of richness, and the cauliflower keeps the whole thing tender rather than heavy while bringing fiber with it.
- Eight eggs are what hold this together, and the yolks are where most of the character lives, giving the bake its gold color and its custardy set. They carry complete protein along with choline and vitamins A and D.
- Cauliflower riced fine almost disappears into the eggs, turning sweet and mild as it roasts and giving the bake its soft body. It belongs to the cabbage family and brings the sulfur compounds and vitamin C that group is known for.
- Sharp cheddar is what makes people go back for a second square. It blisters and browns on top, pulls into strands while the dish is still hot, and brings calcium and a little more protein into every serving.
- Onion softened in olive oil before it goes into the dish keeps its sweetness rather than its bite, and black pepper over the top gives the mild eggs a small edge. The browned corners are the best part of the pan.
- As you eat, pay attention to the browned top giving way to the soft custardy middle and the way the cheddar shows up in bursts, and give the square your full attention rather than eating it standing up.
Frequently Asked Questions
Is cauliflower keto-friendly?
Yes, it's very low in carbohydrate and a great stand-in for higher-carb starches on a ketogenic diet.
Can I make it ahead?
Absolutely, bake it, slice it, and reheat portions through the week.
Why did my bake turn out watery?
Cauliflower holds a surprising amount of water. Cook the riced cauliflower in the pan until it stops steaming and let it cool before it goes into the eggs, and the bake will set firm instead of weeping.
How long does it keep?
Four days, cut into squares and stored in an airtight container with a paper towel underneath them. Reheat at 350°F (175°C) for eight to ten minutes. The microwave is quicker and tightens the eggs, so if that is what you are using, keep it at half power and stop early.