Sweet Potato Kale Breakfast Casserole
Published on October 28, 2026
Quick Summary
This Sweet Potato Kale Breakfast Casserole is made with tender sweet potatoes, sautéed kale, red onion, eggs, cottage cheese, mozzarella, and feta. It’s hearty, flavorful, and packed with protein and vegetables. This easy egg bake is perfect for weekend brunch, holiday mornings, or meal prep because you can make it ahead and enjoy leftovers throughout the week.
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If you love a savory breakfast that will keep you satisfied all morning, this Sweet Potato Kale Breakfast Casserole needs to be on your menu! It’s packed with colorful vegetables, fluffy eggs, and plenty of cheese, making it a delicious way to start the day.
The sweet potatoes add natural sweetness and a hearty texture that pairs beautifully with earthy kale, red onion, and creamy eggs. Cottage cheese is one of my favorite ingredients to add to egg bakes because it boosts the protein and helps keep the casserole tender. Don’t worry if you’re not a cottage cheese fan; it blends right into the egg mixture.
The combination of mozzarella and feta is another favorite. Mozzarella melts into the eggs, while feta adds a salty, tangy bite that complements the sweet potatoes perfectly. Everything bakes together into a satisfying breakfast casserole that feels special but is easy enough to make any day of the week.
This sweet potato egg bake is perfect for weekend brunch, Christmas morning, Easter brunch, or a holiday breakfast when you want something hearty to serve alongside fresh fruit. It’s also a great option for Sunday meal prep. Make it ahead, refrigerate the leftovers, and you’ll have a protein-packed breakfast ready to reheat on busy weekday mornings.
If you’re looking for a breakfast casserole that’s full of vegetables, easy to customize, and delicious warm or reheated, give this one a try!
Ingredients (with Helpful Notes)
- Olive oil: Helps the sweet potatoes and vegetables cook evenly without sticking to the skillet.
- Sweet potato: Peel and dice it into small, evenly sized pieces so it cooks through before the casserole goes into the oven.
- Red onion: Adds a little sweetness and savory flavor. Yellow onion works well, too.
- Water: A small splash helps steam the sweet potatoes in the skillet so they soften more quickly.
- Kale: Use fresh kale, remove the tough stems, and chop the leaves into bite-sized pieces. Curly or lacinato kale both work.
- Eggs: The base of the breakfast casserole. Large eggs work best for the right texture.
- Cottage cheese: Adds protein and helps make the egg mixture creamy and tender. You can use fat-free, low-fat, or full-fat, whatever you prefer!
- Mozzarella cheese: Melts beautifully into the eggs and gives the casserole a creamy, cheesy texture.
- Milk: Helps loosen the egg mixture and keeps the casserole tender.
- Garlic powder: Adds savory flavor without overpowering the vegetables.
- Crushed red pepper flakes: A small pinch adds gentle heat. Leave them out if you prefer a milder breakfast.
- Feta cheese: Sprinkled over the top for a salty, tangy finish that balances the sweet potatoes.
How to Make Sweet Potato Kale Breakfast Casserole
Soften the sweet potatoes. Give the sweet potatoes a head start in the skillet. They take longer to cook than the kale, and you want them tender before they go into the oven.
Add the vegetables. The red onion cooks alongside the sweet potatoes, adding flavor as everything softens. Stir in the kale at the end; it wilts quickly, so there’s no need to cook it for long.
Whisk up the eggs. Mix the eggs with the cottage cheese, mozzarella, milk, and seasonings until everything is well combined. The cottage cheese will give the finished casserole a tender, creamy texture.
Bring it all together. Spread the vegetables in your prepared baking dish, then pour the egg mixture over them. Finish with a generous sprinkle of feta.
Bake until set. Let the oven do the rest of the work. The casserole is ready when the edges are set and the center has just a slight jiggle. Let it rest before slicing so the pieces hold together.
Tips for Making the Best Breakfast Casserole
- Dice the sweet potatoes evenly. Smaller, uniform pieces cook faster and make the casserole easier to slice and serve.
- Don’t skip cooking the vegetables first. This gives the sweet potatoes time to soften and helps prevent excess moisture from the vegetables from affecting the egg mixture.
- Give the kale just a minute or two. It will continue cooking in the oven, so you only need to wilt it in the skillet.
- Season as you go. A little salt and pepper on the vegetables makes a difference, but remember that feta is salty, too.
- Whisk the egg mixture thoroughly. You want the cottage cheese, milk, seasonings, and eggs evenly distributed for a consistent texture.
- Watch the center, not just the edges. Ovens vary, so start checking around the 30-minute mark. The center should be set with only a slight jiggle, not liquid.
- Let it rest before cutting. Five to ten minutes gives the eggs time to settle, making cleaner slices.
- Use a 9×13-inch baking dish. This gives the casserole room to cook evenly without becoming too thick in the center.
How to Store
- Storing: Let the casserole cool, then transfer slices to an airtight container. Refrigerate for up to 4 days.
- Reheating: Warm individual portions in the microwave until heated through. For larger portions, reheat in a covered baking dish in a 325°F oven until hot.
- Freezing: You can freeze individual portions in freezer-safe containers for up to 2 months for best quality. Thaw overnight in the refrigerator before reheating. The texture of the eggs may change slightly after freezing.
- Make ahead: For the best texture, cook the vegetables, let them cool, and refrigerate them separately from the egg mixture. Combine everything in the baking dish and bake the next morning. You can also bake the casserole in advance and reheat portions throughout the week.
Sweet Potato Kale Breakfast Casserole
Ingredients
- 1 tablespoon olive oil
- 1 large sweet potato, peeled and diced (about 3 cups)
- 1/2 red onion, chopped
- 2 tablespoons water
- 4 cups packed chopped kale
- Kosher salt and black pepper, to taste
- 12 large eggs
- 1 cup cottage cheese
- 1 cup shredded mozzarella cheese
- 1/2 cup milk
- 1/2 teaspoon garlic powder
- Dash of crushed red pepper flakes
- 1/2 cup feta cheese
Instructions
- Prep the Oven: Preheat oven to 375°F. Grease a 9×13-inch baking dish and set aside.
- Cook the Sweet Potatoes: In a large skillet, heat the olive oil over medium heat. Add the sweet potatoes. Add a splash of water, cover, and cook for 6 to 8 minutes, stirring occasionally, until the sweet potatoes are starting to soften.
- Add the Onion: Remove the lid and add the red onion. Cook for 3 to 4 minutes, stirring occasionally, until the onion is softened and the sweet potatoes are tender.
- Add the Kale: Stir in the kale and cook for 1 to 2 minutes, just until softened. Remove from heat. Season with salt and pepper, to taste.
- Make the Egg Mixture: In a large bowl, whisk together the eggs, cottage cheese, mozzarella, milk, garlic powder, crushed red pepper flakes, and a little salt and black pepper.
- Assemble: Transfer the sweet potato mixture to the prepared baking dish. Pour the egg mixture evenly over the top and sprinkle with the feta cheese.
- Bake: Bake for 30 to 35 minutes, or until the eggs are set and the center is just slightly jiggly. Remove from the oven and let cool for 5 to 10 minutes before slicing.
Notes
- Dice the sweet potatoes into small, evenly sized pieces to help them cook through.
- Cook the sweet potatoes until tender before assembling the casserole.
- Cottage cheese adds protein and a creamy texture to the eggs.
- The casserole is done when the center is set and only slightly jiggly.
- Let the casserole rest for 5 to 10 minutes before slicing.
- Store leftovers in an airtight container in the refrigerator for up to 4 days.
- For make-ahead preparation, cook and cool the vegetables in advance and assemble with the egg mixture just before baking.
Nutrition
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Variations
- Add more vegetables: Sautéed mushrooms or bell peppers are great additions. Cook vegetables that release a lot of moisture before adding them.
- Switch up the cheese: Try goat cheese instead of feta, or use cheddar in place of mozzarella.
- Add fresh herbs: Chopped parsley, chives, or thyme add a fresh finish.
- Make it spicy: Increase the crushed red pepper flakes or add a little diced jalapeño to the vegetables.
- Add more protein: Stir in cooked turkey sausage or crumbled breakfast sausage for a meatier casserole.
- Try a different green: Spinach or Swiss chard can replace the kale. Add them near the end of cooking since they wilt quickly.
- Use butternut squash: Replace the sweet potato with diced butternut squash, cooking it until tender before assembling the casserole.
Serving Suggestions
This egg casserole is hearty enough to serve on its own, but it’s also great as part of a brunch or holiday breakfast spread. Here are a few recipes to serve on the side:
- Fruit Salad – A fresh, colorful addition to balance out the savory casserole.
- Cinnamon Rolls – Perfect for a special weekend brunch or holiday breakfast.
- Blueberry Muffins – The best blueberry muffins and always a crowd pleaser!
- Healthy Pumpkin Muffins – Add a muffin on the side for the perfect fall breakfast.
- Banana Bread – You can’t go wrong with a thick slice of banana bread!
- Buttermilk Pancakes – Seriously, the best pancakes EVER!
