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Bacon and Egg Sandwiches with Pickled Spring Onions

This elevated bacon and egg sandwich offers a sophisticated twist on a classic breakfast staple. By glazing thick-cut bacon in maple syrup and pairing it with quick-pickled spring onions, the dish achieves a perfect balance of smoky, sweet, and acidic flavours. The addition of peppery rocket and a punchy Sriracha mayonnaise ensures every bite is far more exciting than your average morning roll.

Designed as a high-protein meal, this recipe is ideal for a weekend brunch or a satisfying post-workout recovery lunch. Using the mayonnaise-toasting technique for the bread creates an exceptionally crisp, golden crust that stands up beautifully to the rich fried egg. It is a comforting yet modern dish that brings professional bistro quality to your home kitchen.

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Ingredients for Bacon and Egg Sandwiches with Pickled Spring Onions

  • 4 spring onions or 6 spring onions, whites only, thinly sliced

  • 60ml apple cider vinegar

  • 2 teaspoons sugar

  • 1 teaspoon kosher salt

  • 12 slices thick-cut bacon

  • 2 tablespoons pure maple syrup

  • 60ml mayonnaise

  • 1 tablespoon Sriracha

  • 8 slices white sandwich bread, such as Pullman

  • 60g mayonnaise

  • 2 tablespoons unsalted butter

  • 4 large eggs

  • Kosher salt, ground pepper

  • 1 cup rocket leaves

Combine onions, vinegar, sugar, salt, and 1 tablespoon water in a small bowl and toss to combine; let stand for 30 minutes.

Preheat oven to 177°C. Place bacon on a foil-lined large rimmed baking sheet; brush both sides with syrup. Bake until bacon begins to crisp but is still pliable, 20-25 minutes.

Mix mayonnaise and Sriracha in a small bowl to combine; set aside.

Spread 1 side of bread slices with plain mayonnaise. Heat a large skillet over medium-low heat. Working in batches, cook bread, mayonnaise side down, until brown and crisp, about 3 minutes. Wipe out skillet.

Melt butter in same skillet over medium heat; crack eggs into skillet. Cook, occasionally basting with butter in skillet, until whites are set, about 3 minutes. Season with salt and pepper.

Spread untoasted side of each bread slice with spicy mayo. Build sandwiches with bread, bacon, eggs, pickled spring onions, and rocket.

Disclaimer

While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.

Article history

The information on this page is peer reviewed by qualified clinicians.

  • 28 Jan 2026 | Originally published

    Authored by:

    UK recipe editors

    Peer reviewed by

    UK recipe editors
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