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If you’re craving a savory, comforting brunch option that feels both indulgent and nourishing, the Feta & Mushroom Brunch Squares Recipe is an absolute winner. Picture tender, fluffy egg squares loaded with earthy sautéed mushrooms and bright, salty feta cheese that melts just enough to bring everything together beautifully. This dish is simple enough to whip up on a busy morning but special enough to impress guests or treat yourself on a relaxing weekend. Every bite bursts with warm flavors and a satisfying texture that will make this your new favorite brunch staple.

Ingredients You’ll Need
Gathering the right ingredients is surprisingly straightforward with this recipe, and each component plays a vital role in crafting those irresistible Feta & Mushroom Brunch Squares. From the freshness of the mushrooms to the tangy punch of feta cheese, every ingredient adds texture, flavor, and color to the final dish.
- Olive oil: Provides a rich, fruity base for sautéing the vegetables to perfection.
- Small onion, finely chopped: Adds a subtle sweetness and depth when caramelized.
- Mushrooms, sliced: The star ingredient, giving earthiness and moisture to the brunch squares.
- Garlic, minced: Brings a bright, aromatic kick that elevates the savory elements.
- Large eggs: The binding agent that creates a soft, custardy texture.
- Milk: Keeps the egg mixture tender and adds creaminess.
- Salt: Essential for seasoning and balancing the flavors.
- Black pepper: Adds a mild heat and complexity.
- Dried oregano: Offers a gentle herbal note to enhance the overall flavor.
- Crumbled feta cheese: Delivers a tangy, creamy contrast that shines throughout the dish.
- Grated Parmesan (optional): Adds an extra cheesy touch and golden color when baked.
- Chopped fresh parsley or spinach (optional): Brings freshness and vibrant green color to brighten the brunch squares.
- Cooking spray or butter: For greasing the baking dish so the squares release easily.
How to Make Feta & Mushroom Brunch Squares Recipe
Step 1: Prepare Your Oven and Dish
Start by preheating your oven to 350°F (175°C). While that’s warming up, lightly grease an 8×8-inch baking dish with cooking spray or butter. This step ensures your brunch squares won’t stick and will come out looking neat and delicious.
Step 2: Sauté the Onion
Heat olive oil in a skillet over medium heat. Toss in the finely chopped onion and let it cook until translucent, about three minutes. This gentle cooking brings out its natural sweetness, creating the perfect flavor base.
Step 3: Cook the Mushrooms and Garlic
Add the sliced mushrooms to the skillet, cooking them until they soften and most of their moisture evaporates, roughly five to seven minutes. Stir in the minced garlic and sauté for another minute to release that wonderful aroma. Set the mixture aside to cool slightly before mixing with the eggs.
Step 4: Whisk the Egg Mixture
In a large mixing bowl, whisk together the six eggs, half a cup of milk, salt, black pepper, and dried oregano. This blend will create the light, fluffy structure for your squares.
Step 5: Combine Ingredients
Gently fold the sautéed mushroom and onion mixture into the egg mixture. Then, add the crumbled feta cheese, grated Parmesan (if using), and chopped parsley or spinach. Each of these adds layers of flavor and texture to the dish, making your Feta & Mushroom Brunch Squares truly unforgettable.
Step 6: Bake to Perfection
Pour the mixture evenly into your prepared baking dish, smoothing the top for an even bake. Pop it in the oven and bake for 30 to 35 minutes or until the center is set and the top has turned a lovely light golden brown.
Step 7: Cool and Cut
Allow the baked brunch squares to cool for 5 to 10 minutes. This helps them firm up a bit, making it easier to slice into neat squares. Serve warm or at room temperature for maximum flavor and texture.
How to Serve Feta & Mushroom Brunch Squares Recipe

Garnishes
Brighten your brunch squares with a sprinkle of freshly chopped herbs like parsley or chives just before serving. A dollop of Greek yogurt or a drizzle of tangy hot sauce can also elevate the flavor experience and add a refreshing contrast.
Side Dishes
This versatile brunch square pairs beautifully with crisp green salads, roasted cherry tomatoes, or lightly sautéed asparagus. For a heartier meal, add some crusty bread or a fresh fruit salad on the side to round out your brunch table.
Creative Ways to Present
For a delightful brunch spread, arrange the Feta & Mushroom Brunch Squares on a wooden board with vibrant bowls of olives, nuts, and colorful veggies. You can also use mini muffin tins to make individual bite-sized portions, perfect for parties or on-the-go mornings.
Make Ahead and Storage
Storing Leftovers
Once cooled, store your leftover Feta & Mushroom Brunch Squares in an airtight container in the refrigerator. They will keep well for up to three days, making these squares an easy, ready-to-go option for busy mornings or snacks.
Freezing
If you want to save some for later, these brunch squares freeze beautifully. Wrap individual portions tightly in plastic wrap and then place them in a freezer-safe container or bag. They’ll maintain their texture and flavor for up to two months.
Reheating
To reheat, simply pop the squares in the microwave for about 30 to 60 seconds or warm them in a preheated oven at 325°F (160°C) for around 10 minutes until heated through. This way, you can enjoy your Feta & Mushroom Brunch Squares Recipe anytime without losing that fresh-baked goodness.
FAQs
Can I use other types of cheese instead of feta?
Absolutely! While feta adds a wonderful tangy flavor, you can experiment with goat cheese, ricotta, or even mozzarella for a different texture and taste. Just keep in mind that feta’s saltiness plays a key role, so you might need to adjust the seasoning if you swap cheeses.
Is there a vegetarian alternative for this recipe?
This recipe is already vegetarian-friendly since it contains no meat and is packed with veggies and cheese. If you want it vegan, though, you’d have to replace the eggs and cheeses with vegan substitutes, which can significantly change the texture and flavor.
Can I make this recipe gluten-free?
Yes! The Feta & Mushroom Brunch Squares Recipe is naturally gluten-free since it doesn’t include any flour or bread. Just double-check that any optional ingredients or toppings you use, like cooking spray or Parmesan, don’t contain gluten if you are sensitive.
How do I make the mushrooms less watery?
The key is to cook the mushrooms until most of their moisture evaporates, which usually takes about 5 to 7 minutes over medium heat. Avoid overcrowding the pan, as this causes the mushrooms to steam instead of sauté, leaving extra water in the mixture.
Can I add other vegetables to the brunch squares?
Definitely! Feel free to get creative by adding diced bell peppers, spinach, zucchini, or cherry tomatoes. Just be mindful of their moisture content and cook them appropriately to keep your brunch squares from becoming soggy.
Final Thoughts
Making the Feta & Mushroom Brunch Squares Recipe is like gifting yourself a moment of pure brunch bliss. This dish shines whether you’re serving it for a casual family breakfast or a fun weekend gathering. Easy to prepare, irresistibly tasty, and packed with wholesome ingredients, it’s bound to become a beloved favorite in your recipe collection. Grab your skillet, get those eggs cracking, and enjoy every cozy bite of these delightful brunch squares.
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