Spinach & Mushroom Breakfast Frittata

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

A fluffy, protein-packed frittata loaded with spinach, mushrooms, and cheese, baked to perfection for a quick morning meal. This american-inspired breakfast (high protein) ready in about 30 minutes combines large eggs, milk, spinach into a breakfast that fuels the morning without the midday crash — make-ahead-friendly and balanced enough to anchor the first meal of the day. Each serving lands at about 250 calories and feeds 4, so it sits comfortably in a weekly breakfast rotation alongside fruit, yogurt, or coffee. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

★ 3.8 (14 ratings) Prep: 10 min Cook: 20 min Serves 4 American cuisine 250 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat oven to 375°F. In a bowl, whisk together 6 large eggs, 1/2 cup milk, 1/4 tsp salt, and 1/8 tsp black pepper until well combined.
  2. Step 2: Melt 1 tbsp butter in a 10-inch oven-safe skillet over medium heat. Add 1 cup sliced mushrooms and cook for 3 minutes until softened. Add 1 cup chopped spinach and cook for 1 minute until wilted.
  3. Step 3: Pour egg mixture over vegetables in skillet. Sprinkle 1/2 cup shredded cheddar cheese evenly over the top.
  4. Step 4: Transfer skillet to oven and bake for 18-20 minutes, or until edges are set and center is firm (a knife inserted should come out clean). Top with 1/4 cup grated parmesan before serving.

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Frequently asked questions

How long does Spinach & Mushroom Breakfast Frittata take to make?

Total time is about 30 minutes (10 min prep + 20 min cook). Most home cooks find this fits comfortably into a busy morning; prep components the night before to save active time.

How do I store leftover Spinach & Mushroom Breakfast Frittata?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat in the microwave or oven; egg- or grain-based items may need a splash of milk or water to refresh texture. Cold-served items (overnight oats, smoothies) keep 2–3 days in the fridge.

Can I substitute ingredients in Spinach & Mushroom Breakfast Frittata?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Spinach & Mushroom Breakfast Frittata for a different number of people?

The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

Is Spinach & Mushroom Breakfast Frittata high protein?

Yes — this recipe is tagged high protein based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.

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