Bacon Sandwich with Caramelized Onions
The ultimate bacon sandwich just got an upgrade! Caramelized onions + crispy bacon + sourdough = a flavor bomb you'll crave every time.
Ingredients
For the Caramelized Onions:
- 2 large yellow onions thinly sliced
- 2 tbsp unsalted butter
- 1 tbsp vegetable oil
- 1 tsp brown sugar optional
- 1 tbsp balsamic vinegar
- Salt and freshly ground black pepper to taste
For the Bacon:
- 8 slices thick-cut bacon
- 1 tsp fresh thyme leaves optional
For Assembly:
- 8 slices artisanal sourdough bread
- 4 tbsp mayonnaise
- 2 tbsp whole grain mustard
- 2 cups fresh arugula
- 4 slices aged cheddar cheese optional
Instructions
Caramelize the Onions
- Slice onions into even half-moons.
- In a skillet, heat butter and oil over medium-low. Add onions and salt.
- Stir and cook for 5 minutes, then reduce heat to low.
- Stir every 5–7 minutes for 35–45 minutes until deep golden and jammy.
- In final 5 mins, stir in brown sugar (optional) and balsamic vinegar. Season.
Cook the Bacon
- Place bacon in a cold skillet. Turn heat to medium-low.
- Cook 7–10 mins, flipping until crispy but slightly flexible.
- Drain on paper towels. Sprinkle thyme on top if using.
Toast the Bread
- Toast sourdough slices until golden and crisp but still tender inside.
- Assemble the Sandwiches
- Spread mayo and mustard on each slice.
- Layer arugula, caramelized onions, 2 bacon slices, and cheese (if using).
- Add final onions, then top with second bread slice (mustard side in).
- Press gently and cut diagonally to serve.
Notes
- Cheese Swap: Try Gruyère or Comté for deeper flavor.
- Greens Swap: Baby spinach or watercress work well.
- Bread Options: Use multigrain, walnut, or gluten-free as needed.
- Add-ons: Fried egg, roasted red peppers, apples, or fig jam.
- Meal Prep Tip: Onions can be made 3 days in advance and stored refrigerated.
Nutrition
Serving: 1gCalories: 610kcalCarbohydrates: 42gProtein: 22gFat: 38gFiber: 3gSugar: 7g
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