This fluffy, oven-baked four-cheese frittata is rich, savory, and loaded with melty goodness. It’s perfect for brunch, lunch, or a quick weeknight dinner.
Whisk the beaten eggs, milk, salt, black pepper, red pepper flakes, and half the herbs until smooth.
Warm olive oil and butter in a 10-inch oven-safe skillet over medium heat.
Sauté onion until soft, 3–4 minutes. Stir in garlic and cook 30 seconds until fragrant.
Add spinach and cook until wilted. Spread vegetables in an even layer.
Scatter mozzarella and cheddar over the skillet, dot with goat cheese, then pour in the egg mixture.
Cook on the stovetop until edges start to set, 3–4 minutes. Sprinkle Parmesan on top.
Transfer to the oven and bake until just set in the center, 10–12 minutes. Broil 1–2 minutes for extra color if desired.
Rest 5 minutes. Top with remaining herbs and optional tomatoes. Slice and serve warm.
Notes
Variation: Swap the goat cheese for ricotta dollops for a creamier bite, or add cooked bacon crumbles for a smoky twist. Leftovers keep well refrigerated for up to 3 days; reheat gently in a low oven.This recipe is an original creation inspired by classic Four Cheese Frittata Recipes flavors. All ingredient ratios and instructions are independently developed.