When I whipped up this bacon sandwich with caramelized onions for the first time, I couldn’t believe how perfect it turned out! The crispy, smoky bacon combined with the sweet, golden onions was a flavor bomb. Layered between toasted bread, the textures and taste were out of this world.
Whether I’m making it for breakfast, a quick lunch, or a midnight snack, it’s always a hit. Trust me, once you try it, you’ll fall head over heels for this comforting creation. You can also enjoy a delicious gingerbread trifle as an indulgent dessert pairing!

Ingredients
- 6 slices thick-cut bacon
- 2 large onions, thinly sliced
- 2 tablespoons olive oil
- 1 tablespoon butter
- 4 slices of your favorite bread
- Optional add-ons: lettuce, tomato, mayonnaise, mustard
Note: This recipe serves 2.
Variations
Get creative and customize this sandwich to suit your preferences or dietary needs. Here are a few ideas:
- Swap thick-cut bacon for turkey bacon for a leaner option.
- Use gluten-free bread or whole-grain bread for added fiber.
- Replace butter with ghee or a dairy-free spread for a lactose-free version.
- Add extras like a fried egg, avocado slices, or sharp cheddar cheese.
- Sweeten the onions with a drizzle of honey or add balsamic vinegar for tanginess.
For more food inspiration, explore a variety of appetizers recipes to complement this sandwich and elevate your meal.
Cooking Time
- Prep Time: 10 minutes
- Cooking Time: 30 minutes
- Total Time: 40 minutes
Equipment You Need
- Skillet: For caramelizing onions and cooking the bacon.
- Toaster: To get your bread golden and crispy.
- Knife: For thinly slicing onions to perfection.
- Spatula: To stir onions and flip bacon with ease.
How to Make Bacon Sandwich with Caramelized Onions?
Making this sandwich is straightforward and fun. Read through the steps, gather your ingredients, and let’s get started!
Caramelize the Onions
Start by heating olive oil and butter in a skillet over medium-low heat. Add the thinly sliced onions to the pan and stir occasionally to coat them in the oil. Now, it’s all about patience! Keep cooking the onions for around 20–30 minutes, stirring every few minutes, until they turn a rich golden brown. The transformation is magical!
Cook the Bacon
While the onions are caramelizing, take another skillet and lay down the thick-cut bacon slices. Fry them over medium heat until they achieve your ideal level of crispness. Whether you like them chewy or crunchy, it’s entirely up to you. Once cooked, place the bacon slices on paper towels to soak up any excess grease.
Prepare and Assemble
Toast your bread slices until they’re delightfully golden. Spread your favorite condiment like mayonnaise or mustard on one side of each slice. Start building your sandwich by layering the caramelized onions, followed by the crispy bacon. Add extras like lettuce or tomato if you like, then crown it with the second slice of bread. Enjoy your masterpiece! You might also savor the experience with some chocolate-filled cookies for a sweet contrast.

Source: Pinterest
Why You’ll Love This Recipe?
This bacon sandwich isn’t just tasty; it’s also incredibly versatile and easy to make. Here’s why I love it and you will too!
- Easy to prepare for any mealtime or skill level.
- Unbelievable flavor from smoky bacon and sweet onions.
- Highly customizable with limitless topping options.
- Perfect for casual gatherings or a quick solo meal.
- Make-ahead friendly with advanced prep options.
How to Serve Bacon Sandwich with Caramelized Onions?
For a polished look, slice your sandwich diagonally and serve with a side of crispy chips, a refreshing salad, or a steaming bowl of tomato soup. Garnish with fresh parsley or a dollop of aioli for a gourmet upgrade. Presentation matters, and this sandwich deserves it!
Nutritional Information
This is a satisfying yet balanced meal. Here’s what you’re getting per serving:
- Calories: 420
- Protein: 12g
- Carbohydrates: 35g
- Fat: 20g
Make Ahead and Storage
If you like to plan ahead or find yourself with leftovers, this sandwich is easy to manage.
Storing Components
Caramelized onions keep beautifully in an airtight container in the fridge for up to a week. Cooked bacon can be prepped in advance and reheated when needed.
Freezing Option
You can freeze both bacon and caramelized onions separately in freezer-safe bags. They’ll stay fresh, and you can thaw them in the fridge as needed.
Shelf Life
While the sandwich is best served fresh, keeping the components separate ensures everything stays fresh and tasty when assembled later.
Tips for Making the Recipe
From my kitchen to yours, here are my personal tips for making this bacon sandwich even better!
- Deglaze the onion skillet with a splash of red wine or broth for extra flavor.
- Bake bacon in the oven for evenly crispy and mess-free results.
- Toast the bread with a little butter in a pan for an indulgent twist.
- Be patient with the onions; slow cooking guarantees that caramelized sweetness.
Enjoy every bite of this sandwich, and don’t forget to customize it to your taste for a dish that speaks to your soul!
For a step-by-step guide, check out this YouTube video:

Best Bacon Sandwich With Caramelized Onions Recipe
Ingredients
- 6 slices thick-cut bacon
- 2 large onions thinly sliced
- 2 tablespoons olive oil
- 1 tablespoon butter
- 4 slices of your favorite bread
- Optional add-ons: lettuce tomato, mayonnaise, mustard
Instructions
- Start by heating olive oil and butter in a skillet over medium-low heat. Add the thinly sliced onions to the pan and stir occasionally to coat them in the oil. Now, it’s all about patience! Keep cooking the onions for around 20–30 minutes, stirring every few minutes, until they turn a rich golden brown. The transformation is magical!
- While the onions are caramelizing, take another skillet and lay down the thick-cut bacon slices. Fry them over medium heat until they achieve your ideal level of crispness. Whether you like them chewy or crunchy, it’s entirely up to you. Once cooked, place the bacon slices on paper towels to soak up any excess grease.
- Toast your bread slices until they’re delightfully golden. Spread your favorite condiment like mayonnaise or mustard on one side of each slice. Start building your sandwich by layering the caramelized onions, followed by the crispy bacon. Add extras like lettuce or tomato if you like, then crown it with the second slice of bread. Enjoy your masterpiece!
Notes
- Deglaze the onion skillet with a splash of red wine or broth for extra flavor.
- Bake bacon in the oven for evenly crispy and mess-free results.
- Toast the bread with a little butter in a pan for an indulgent twist.
- Be patient with the onions; slow cooking guarantees that caramelized sweetness.