Grilled Chicken Bacon Onion Panini Sandwich

Grilled chicken, onions, bacon, and spinach are tucked between two slices of hearty bread, then grilled on a panini press. Deliciousness!

Cheesy Grilled Chicken Panini Sandwich - Crispy bacon, caramelized onions, baby spinach, and lots of cheese, grilled up between layers of 3-cheeses sourdough. Recipe from @itsyummi
This panini sandwich recipe is part of social shopper amplification for Collective Bias and their advertiser. I was compensated for this post, but all thoughts and opinions are my own.

Friends, this grilled chicken sandwich is one to love!

I think simple seasonings like butter and sea salt can be the best flavor enhancers when it comes to creating tasty dinner recipes, but they aren’t the healthiest of ingredients.

Butter is loaded with calories and cholesterol, and too much salt can cause high blood pressure. So some people are required to find suitable substitutes for those ingredients.

I think both are perfectly fine in moderation, but I’m a bit of a butter glutton. Can you imagine eating a slice of warm, homemade bread without butter on it? Or a dish of eggs Bemedict without the Benedict?  To be honest, I get a bit woozy thinking about it.

The reality is that my dad died of heart disease before the age of 50, so I really need to monitor my cholesterol.  Even if you don’t have a history of heart problems, high cholesterol and hardened arteries can appear suddenly, so it’s important to think about preventative measures.

What’s a butter lover to do? Well, as I played around and tested different alternatives, I found that olive oil is an awesome and tasty substitute for butter.

Ingredients needed to make a Grilled Chicken Bacon Onion Panini.


  • Olives are a fruit, and olive oil is a fruit juice derived from pressing or mashing the olives.
  • Olive oil contains only 33% saturated fat, while butter is composed of 66% saturated fat.
  • Olive oil has no cholesterol, while a serving of butter has 33mg of cholesterol.

Are all olive oils the same?  Not at all!

Olive oil comes in 4 varieties: virgin, extra virgin, pure and light. Virgin means that no chemicals were used in the process of extracting the oil from the fruit. Extra virgin means that the olive oil has undergone several tests to confirm its taste and to verify that it’s free of defects. Light olive oil is a blend of pomace olive oil, which is olive oil that’s been extracted from the fruit using heat and chemicals.

It’s a healthier form of fat , so I use olive oil regularly, and I’m content with that decision.
However, Star created a butter flavored olive oil! If I can have healthy olive oil with the taste of butter, I think I may be able to have the best of both worlds.

I bought some at Walmart and was excited to create a recipe with it.

For a simple taste test, it would’ve been easy to drizzle some over potatoes before roasting, or to toss some fresh veggies with it, but I really wanted to test the buttery flavor out on something that I typically use butter with.

So, I decided to make a grilled chicken panini.

Cheesy Grilled Chicken Panini Sandwich - Crispy bacon, caramelized onions, baby spinach, and lots of cheese, grilled up between layers of 3-cheeses sourdough. Recipe from @itsyummi

Grilled sandwiches must be perfectly crispy on the outside to taste their best. So, I used olive oil on the bread instead of butter. On the inside: Caramelized onions, baby spinach, crisp bacon, aged cheddar cheese, and grilled chicken.

Fresh chicken breast and Star olive oil in my Costco shopping cart. Check. “But the frozen foods section has precooked, Tyson grilled chicken strips”, I thought.  I use it often in recipes like mushroom chicken bourguignon, and it’s in this recipe, too.

Precooked chicken means less prep and less cooking time for this grilled chicken sandwich, plus it’s delicious. It’s a win-win.

If you don’t have a panini press, you can use a grill pan or a heavy cast iron skillet.

Grilled Chicken Panini with Bacon, Onions, Spinach, and Cheese. - Recipe on
Cheesy Grilled Chicken Panini Sandwich - Crispy bacon, caramelized onions, baby spinach, and lots of cheese, grilled up between layers of 3-cheeses sourdough. Recipe from @itsyummi

Cheesy Grilled Chicken Bacon Panini

Tender grilled chicken, crisp bacon, caramelized onions, and cheese all tucked between two slices of sourdough bread. It doesn’t get more delicious than this for lunch!
5 from 5 votes
Prep Time 5 minutes
Cook Time 5 minutes
Total Time 10 minutes
Course Snack
Cuisine American
Servings 1
Calories 753 kcal


  • 2 slices of hearty bread (I used sourdough)
  • 2 ounces cooked chicken breast thinly sliced
  • 2 slices cooked bacon
  • 1 Tablespoon butter flavored olive oil divided
  • 2 Tablespoons caramelized or grilled onions
  • 6 baby spinach leaves
  • 1 ounce cheese (your choice)


  • Lightly grease inside of a panini press or pan with 2 teaspoons olive oil. Preheat panini press or pan while you assemble your sandwich. Use pastry brush to apply olive oil onto one side of both slices of bread. Onto the dry side of one slice, layer chicken, onions, bacon, spinach, and cheese. Top with remaining slice of bread, coated side up.
  • Place sandwich into panini press and close lid (or weigh it down in a pan). Grill for 2-3 minutes or until sandwich has compressed, bread is grilled, and cheese has melted.


Calories: 753kcalCarbohydrates: 32gProtein: 40gFat: 51gSaturated Fat: 16gCholesterol: 115mgSodium: 952mgFiber: 4gSugar: 4g
Tried this recipe? Mention @itsyummi or tag #itsyummirecipe!
Cheesy Grilled Chicken Panini Sandwich - Crispy bacon, caramelized onions, baby spinach, and lots of cheese, grilled up between layers of 3-cheeses sourdough. Recipe from @itsyummi


  1. Clearly I ran right over when I saw this gorgeous sandwich. Totally Yummi!!! How was the butter flavored olive oil? Sounds intriguing.

    1. I was really happy with the taste of the butter flavor, Libby! Granted, it isn’t BUTTER, but a much healthier alternative ๐Ÿ™‚

  2. Mmm… that does look delicious! But, I think anything with carmelized onions and bacon is bound to be good. I bet the butter flavored olive oil really added to this dish.

    1. That butter flavor came right through the bread and to my lips in an awesome way, Andrea! Thanks for stopping over ๐Ÿ™‚

  3. Delicious! What a wonderful combination and using the olive oil is so much healthier than butter but to have that delightful butter flavor. Mmmmm

    1. Thank you, Patty! I would encourage you to give the Star butter flavored olive oil a try. It’s got a great butter flavor!

  4. I use olive oil on almost everything these days. The one place I still use butter is on perogies. This sandwich looks deeeeelish!

  5. Your sandwich looks amazing love it! It’s so funny I never thought of Costco as carrying any other brand than forster farms hormone free chicken we buy but you must be on the East Coast.. Is the chicken still hormone and antibiotic free.. I know it’s a silly question but since you brought up the size of the chicken breast I became curious! Have a wonderful weekend!

  6. I am a huge fan of bacon in all grilled sandwiches. I have not made a panini in a while. This recipe is inspiring me to pull it out and use it.

    1. Thanks for stopping by, Raquel! I hope you make yourself a panini soon. They’re too good to stay away from for long ๐Ÿ˜‰

  7. I love any type of grilled sandwich, and your panini looks amazing, Becca! Bacon really does make everything better… ๐Ÿ˜‰

  8. 5 stars
    Fundamental! Totally delicious…. I grilled my onions in herb butter! Best choice AND I used jJalapeรฑo and bacon cheese ?

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