Keto Spinach & Cheddar Frittata

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

A protein-packed, low-carb breakfast that's fluffy and packed with fresh spinach and sharp cheddar, perfect for fueling your morning workouts. This american-inspired breakfast (keto, high-protein) ready in about 25 minutes combines Large eggs, Fresh spinach, Shredded cheddar cheese 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 320 calories and feeds 2, 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.

★ 4.2 (9 ratings) Prep: 10 min Cook: 15 min Serves 2 American cuisine 320 cal/serving
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Ingredients

Instructions

  1. Step 1: Heat 1 tbsp avocado oil in an 8-inch nonstick skillet over medium heat until shimmering. Add 1/4 cup diced shallot and cook for 2 minutes until translucent and fragrant, stirring occasionally.
  2. Step 2: Add 2 cups fresh spinach to the skillet and cook for 1 minute until wilted and reduced in volume, stirring constantly to distribute heat.
  3. Step 3: In a bowl, whisk 6 large eggs with 1/4 tsp salt and 1/8 tsp black pepper until fully combined and slightly frothy.
  4. Step 4: Pour the egg mixture over the spinach and shallot in the skillet. Tilt the pan to evenly distribute the eggs.
  5. Step 5: Cook undisturbed for 3 minutes until edges set, then sprinkle 1/2 cup shredded cheddar cheese evenly over the top.
  6. Step 6: Reduce heat to low, cover the skillet with a lid, and cook for 4-5 minutes until the eggs are fully set and the cheese is melted, checking occasionally to prevent overcooking.

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Frequently asked questions

How long does Keto Spinach & Cheddar Frittata take to make?

Total time is about 25 minutes (10 min prep + 15 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 Keto Spinach & Cheddar 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 Keto Spinach & Cheddar 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 Keto Spinach & Cheddar Frittata for a different number of people?

The recipe is written for 2 servings. Multiply each ingredient by (your serving target / 2). 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 Keto Spinach & Cheddar Frittata keto?

Yes — this recipe is tagged keto, 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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