This 5-Minute Mayo Is a Game Changer
A BLT is only as memorable as its components, and this rosemary-garlic mayonnaise elevates the sandwich from good to irresistible. Smoky, crisp bacon; cool, crunchy lettuce; and ripe tomato slices are all classics — but a simple mayo seasoned with fresh rosemary, garlic and a touch of lemon adds an herbal brightness that ties everything together. It takes just a few minutes to make and transforms the whole sandwich.
Because there are so few ingredients in a BLT, choose each one thoughtfully. Use thick-cut bacon for texture, a juicy, fully ripe tomato for sweetness, a sturdy bread that stays crisp under the tomato juices (sourdough or a good sandwich loaf works well), and crisp lettuce. Spread the rosemary mayo generously on both slices of toast and enjoy every bite.
BLT Tips
This sandwich is simple, so small details make a big difference. The suggestions below will help you get the best flavor and texture from each component.
- Choose excellent tomatoes: Avoid soft, watery tomatoes. Look for fruit that feels heavy for its size and has a fragrant stem aroma. Heirloom varieties are wonderful, but any perfectly ripe tomato will do.
- Salt the tomato slices: Lay the slices on a paper towel, sprinkle with flaky salt, and let them rest for five minutes while you toast the bread. This draws out excess moisture and seasons the tomatoes through.
- Let the mayo rest: If you can, let the rosemary mayo sit at least 15 minutes so the flavors meld. It improves after 30 minutes and often tastes even better the next day.
- Consider baking the bacon: For multiple sandwiches, bake bacon on a sheet pan at 400°F for 15–20 minutes. It cooks more evenly and keeps your stovetop clean.
- Spread mayo to the edges: Apply rosemary mayo all the way to the edges on both slices of toast. It boosts flavor and acts as a moisture barrier to help prevent sogginess.
- Assemble just before serving: This sandwich is best fresh. Put it together, slice, and serve immediately so the bacon stays crisp and the toast remains crunchy.
Variations You Can Try
The classic BLT is hard to beat, but these simple swaps and additions can make it feel new and exciting.
- Add sliced avocado: Turn your BLT into a BLAT—extra creamy and rich, and especially nice with the rosemary mayo.
- Swap lettuce for arugula: Use arugula for a peppery bite and more complex green flavor.
- Add a fried egg: A runny yolk makes the sandwich more filling and indulgent.
- Include thin red onion: For extra crunch and a bright bite, add thinly sliced red onion.
- Make it spicy: Stir a pinch of crushed red pepper, cayenne, or Calabrian chile paste into the mayo.
- Use balsamic instead of lemon: Swap the lemon juice in the mayo for a splash of balsamic vinegar for a deeper, slightly sweet note.
- Add fresh mozzarella: Layer thin slices of fresh mozzarella for a BLT-meets-caprese combination.
- Grill the bread: Brush bread lightly with olive oil and grill it for a smoky, extra-crisp summer version.
FAQ
Yes. Store it in an airtight container in the refrigerator for up to a week. The flavors continue to meld, so it often tastes better the second day. It’s also excellent on burgers, roasted potatoes, and as a dip for fried foods.
Fresh rosemary is preferred because it blends more naturally into the mayo and has a brighter, less concentrated flavor. If you must use dried rosemary, crush it finely and use a much smaller amount to avoid a tough, woodsy texture.
Toast the bread well, spread mayo on both slices, quickly drain very juicy tomato slices on paper towels, and assemble right before serving. Placing lettuce against the bread also adds another moisture barrier.
BLT with Rosemary Mayo
15
20
35
4
servings
Pin
Ingredients
Rosemary Mayo
- 1/2 cup mayonnaise
- 1 teaspoon finely chopped fresh rosemary
- 1 teaspoon lemon juice
- 1/2 teaspoon Dijon mustard
- 1 small garlic clove, pressed or finely minced
- freshly-ground black pepper, to taste
BLTs
- 8 slices thick-cut bacon
- 8 slices sourdough, sandwich bread, or your favorite bread
- 2 large ripe tomatoes, sliced
- 4 leaves romaine, butter lettuce, or green leaf lettuce
- flaky sea salt and freshly-ground black pepper
Instructions
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Make the rosemary mayo. Stir together the mayonnaise, finely chopped rosemary, lemon juice, Dijon mustard, pressed or minced garlic, and a few twists of freshly-ground black pepper until well combined. Taste and adjust with more rosemary, lemon, or pepper as needed. Let it sit for at least 15 minutes if possible so the flavors meld.
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Cook the bacon. Cook bacon in a skillet over medium heat until crispy, or bake on a parchment-lined sheet pan at 400°F (200°C) for 15–20 minutes for even crisping. Transfer cooked bacon to a paper towel-lined plate to drain excess fat.
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Toast the bread. Toast the slices until golden and crisp so they hold up to the tomato juices.
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Season the tomatoes. Lightly sprinkle tomato slices with flaky sea salt and freshly-ground black pepper. Let them sit briefly to draw out excess moisture and enhance flavor.
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Assemble the sandwiches. Spread a generous layer of rosemary mayo on one side of each slice of toast. Layer with lettuce, bacon, and seasoned tomato slices. Spread mayo to the edges to help prevent sogginess.
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Serve. Close the sandwiches, slice in half, and serve immediately while the bacon is still crisp and the toast is warm.
Did you make this?
Share how it turned out in the comments below — I love hearing about tweaks and variations.