A brown butter omelet packed with a blend of King Oscar sardines, fresh veggies, and melted cheese. The perfect way to kickstart your day!

Omelette on plate with side salad, cup of coffee, and package of sardines.

This post is sponsored by King Oscar | Thank you for supporting the brands I trust.

There Are Serious Holiday Brunch Vibes With This One.

Deep, nutty brown butter creates one heck of an indulgent omelette. Add to that some gooey mozzarella, fresh veggies, and tender brisling sardines, and you’ve got yourself the perfect blend for a lazy yet rewarding Sunday brunch.

You can pair it with a mimosa, bloody mary, or your morning cup of coffee. You can serve it with a fresh salad or hash browns.

However you decide to do it, I think you’ll be quite pleased. So much, in fact, that you’ll be treating yourself to this omelet again and again.

It’s a fantastic way to kickstart the day!

King Oscar’s Sardines Make All the Difference.

In my mind, sardine brands aren’t interchangeable; King Oscar or bust!

In this recipe I’ve used King Oscar’s Royal Selection Brisling Sardines in Extra Virgin Olive Oil with Basil, Oregano & Garlic. They bring a garlicky and herbaceous hint to the omelet while also offering vitamins, nutrients, and protein.

The fillets are wood-smoked and come in a round can with a transparent easy-peel lid, so you can see the quality of the ingredients right from the get-go.

If you’re a sardine lover, this omelette will speak to you. If you have yet to dip into the world of sardines, now’s a good time.

Round wooden serving board with eggs, cherry tomatoes, parsley, spinach, onions, and package of sardines on top.

Hand holding up sardine tin to show detail in quality of fillets.

Ingredients List.

  • Eggs
  • Butter
  • King Oscar’s Royal Selection Brisling Sardines in Extra Virgin Olive Oil with Basil, Oregano & Garlic
  • Sea salt and cracked black pepper
  • Grape or cherry tomatoes
  • Mozzarella cheese
  • Spinach
  • Red onion

Here’s How to Make This Luscious Omelet.

  1. Prep all of your ingredients in advance; chop your veggies, shred your cheese, etc.
  2. Whisk the eggs in a small bowl with a fork.
  3. Heat a small nonstick skillet over medium-high heat. Add the butter and reduce the heat to medium. The butter will melt into a foam and sizzle. At this point, stir the butter and keep stirring it for a minute or two. It won’t take long for it to brown since it’s such a small amount, so you want to babysit the pan.
  4. Add the beaten eggs to the pan and whirl them around once to ensure the eggs cover the entire bottom of the pan. Hit the eggs with some salt and pepper.
  5. Once you notice the edges of the egg folding up, cooked, gently glide a silicone spatula around the edges to lift them ever so slightly.
  6. Place your cheese, spinach, tomatoes, onions, parsley, and sardine fillets on one side of the omelette.
  7. Then, using the spatula, carefully fold the other side of the omelette over, and slowly slide it onto a plate. Top it with some extra cracked black pepper and some chopped fresh parsley.

frying pan with omelette being folded over ingredients.

Omelette on plate with side salad.

Useful Tools for This Recipe:

Recipe Tips + Tricks.

  1. If you can’t find this variety of King Oscar’s sardines at your local grocer, they are available on Amazon. You could also use another variety instead, like the Mediterranean-Style sardines, or sardines in zesty tomato sauce. Get creative!
  2. When browning the butter, after a few minutes of stirring it over medium heat, it will turn golden brown in color and will smell warm and nutty. You’ll notice some toasted brown bits in your pan—that’s all flavor, so leave them!
  3. Once the eggs hit the pan and you whirl them around to coat the bottom, let them cook for a good minute or so. You don’t want to touch them until you see the edges cook and slightly curl upward. Then, once the middle is set, carefully flip the omelet in half.

Check out these 25 sardine recipes for more ideas on ways to get creative!

Omelette with side salad on a plate with morning sunlight lines shining over it.

Have You Made This Recipe?

If you enjoyed this recipe, please consider leaving a STAR rating & commenting below with feedback!

You can also show off your creations on Instagram by tagging @killing__thyme

More Sardine Recipes to Try:

Omelette on plate with side salad.

Brown Butter Omelet with King Oscar Sardines

A brown butter omelet packed with a blend of King Oscar sardines, fresh veggies, and melted cheese. The perfect way to kickstart your day!
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Prep Time: 10 minutes
Cook Time: 10 minutes
Total Time: 20 minutes
Servings: 1 omelette
Author: Dana Sandonato

Ingredients

  • 2 large pasture-raised eggs
  • 1/2 TBSP butter
  • 4 sardine fillets from a tin of King Oscar's Royal Selection Brisling Sardines in Extra Virgin Olive Oil with Basil, Oregano & Garlic *See notes
  • Sea salt and cracked black pepper
  • 2-4 cherry or grape tomatoes, sliced
  • 2 TBSP shredded mozzarella cheese
  • 2 TBSP ribboned baby spinach
  • 2 TBSP thinly sliced red onion I like using a mandolin to have thinly shaved slices

Instructions

  • Get all of your ingredients ready: chop your veggies, shred your cheese, etc.
  • In a small bowl, whisk the eggs with a fork.
  • Heat a small nonstick skillet over medium-high heat. When the pan is hot, add the butter and reduce the heat to medium. The butter will melt, sizzle, and get foamy. At this point, stir the butter for a minute or two, until it's browned. It won't take long since it's a small amount of butter, so keep a close eye on the pan to prevent burning. When the butter has browned, it will give off a bold and nutty aroma. You'll also notice some little brown bits in the pan—that's flavor! So keep them.
  • Add the eggs to the pan and whirl them around once to cover the entire bottom of the pan. Sprinkle with some salt and pepper.
  • Once the edges of the egg start folding up and look cooked, carefully glide a silicone spatula around the edges.
  • Sprinkle the cheese on one side of the omelette, then add the spinach, tomatoes, onions, parsley, and sardine fillets on top of the cheese.
  • Using the spatula, carefully fold the other side of the omelette over, and carefully slide it onto a plate. Hit it with some extra cracked black pepper and some chopped fresh parsley.

Notes

If you can't find this specific variety of King Oscar's sardines, they are available on Amazon. You could also use another variety, like the Mediterranean-Style sardines or sardines in zesty tomato sauce.