BLT with Rosemary Mayo

A classic BLT gets an instant upgrade with a bright, savory rosemary-garlic-lemon mayo. Crispy bacon, juicy tomatoes, crunchy lettuce, and sturdy toasted bread become more than the sum of their parts when you add this 5-minute herbed mayo. Simple ingredients, bold flavor, and perfect for peak tomato season.

Why This BLT Hits Different

• Herb-infused mayo adds aromatic depth and zesty brightness without extra work.
• Simple ingredient list means every component shines—quality really counts.
• Quick weeknight-friendly: 20 minutes, start to finish.
• Flexible: oven, skillet, or air fryer for bacon; easy to make vegetarian or gluten-free.

Ingredients

Makes 2 sandwiches

• 4 slices thick-cut bacon
• 4 slices sturdy bread (sourdough or country loaf), toasted
• 1 large ripe tomato, sliced 1/4-inch thick
• 4–6 crisp lettuce leaves (romaine, iceberg, or butter)
• Kosher salt and freshly ground black pepper

Rosemary Mayo

• 1/3 cup mayonnaise
• 1–2 teaspoons fresh rosemary, very finely chopped
• 1 small garlic clove, finely grated or mashed to a paste
• 1 teaspoon lemon zest
• 2 teaspoons fresh lemon juice
• 1/8 teaspoon crushed red pepper flakes (optional)
• Pinch kosher salt and black pepper

Step-by-Step Instructions

1. Cook the bacon: Oven method—heat to 400°F (200°C). Arrange bacon on a parchment-lined sheet pan (or on a rack set over the pan). Bake 15–20 minutes until crisp. Transfer to a rack or paper towels to drain.
2. Make the rosemary mayo: In a small bowl, mix mayo, rosemary, garlic, lemon zest, lemon juice, red pepper flakes (if using), salt, and pepper. Let sit 5 minutes to bloom the flavors. Taste and adjust lemon or salt.
3. Toast the bread: Toast slices to golden and sturdy. For extra crunch, lightly butter the toast while warm (optional).
4. Assemble: Spread rosemary mayo generously on both slices of each sandwich (this helps resist sogginess). Layer lettuce, then tomato (season tomato with a pinch of salt and pepper), then bacon. Cap with the second slice, press gently, and cut in half.
5. Serve immediately while the bacon is crisp and the toast is warm.

Pro Tips

• Chop rosemary ultra-fine so it perfumes the mayo without feeling prickly.
• Season your tomatoes lightly—salt unlocks sweetness and juiciness.
• Spread mayo on both slices of toast to create a moisture barrier.
• Use a rack to cool bacon so it stays crisp.
• If tomatoes are very juicy, blot slices or shingle them over lettuce to protect the bread.

Common Mistakes to Avoid

• Using soft sandwich bread: it collapses. Choose a sturdy, wide-crumb loaf.
• Skipping the rest time for the mayo: flavors meld in a few minutes.
• Under-seasoning: a pinch of salt on tomatoes makes a big difference.
• Stacking hot bacon directly on lettuce: let it cool 30–60 seconds to keep greens crisp.
• Thick rosemary pieces: mince finely to avoid woody bites.

Recommended Tools

• Half-sheet pan and wire rack (for super-crisp oven bacon)
• Cast-iron or stainless skillet (if pan-cooking bacon)
• Chef’s knife and cutting board
• Microplane or fine grater (for garlic and lemon zest)
• Small mixing bowl and spoon
• Toaster or skillet for toasting bread

Variations

• BLAT: Add ripe avocado slices for creamy richness.
• Fried egg BLT: Top with a jammy egg for brunch vibes.
• Smoky rosemary aioli: Add 1/4 teaspoon smoked paprika to the mayo.
• Vegan: Use plant-based bacon and vegan mayo; add avocado for body.
• Gluten-free: Use GF sourdough or wrap in crisp lettuce leaves.
• Spicy: Stir 1 teaspoon Calabrian chile paste or hot sauce into the mayo.

FAQ

Can I make the rosemary mayo ahead?

Yes. Mix the mayo up to 4 days in advance and refrigerate in an airtight container. The flavors deepen as it rests, but the garlic may intensify slightly by day two. If it thickens, whisk in a few drops of lemon juice or water to loosen right before spreading.

What’s the best way to cook bacon for a BLT?

Oven-baked bacon is reliably crisp and hands-off: 400°F (200°C) for 15–20 minutes on a rack set over a sheet pan. For smaller batches, pan-fry over medium heat. Air fryer works too: 370°F (188°C) for 7–10 minutes, checking early to avoid over-browning.

What bread works best?

Choose sturdy, flavorful slices like sourdough, country white, or multigrain. Toast to golden so it resists tomato juices. Avoid ultra-soft sandwich bread, which can collapse. For extra structure, lightly butter or oil the toast while warm to create a crisp moisture barrier.

How do I get great flavor when tomatoes aren’t in season?

Use high-quality cherry or Campari tomatoes, which tend to be sweeter year-round. Slice and season with salt to draw out flavor. Alternatively, briefly roast or confit tomatoes to concentrate sweetness, then cool before assembly to avoid wilting the lettuce.

How can I keep a BLT from getting soggy for lunch?

Spread mayo on both slices of toast, layer lettuce directly on the mayo, then add tomatoes and bacon. Pat tomatoes dry and season lightly. If packing, keep components separate and assemble right before eating. Or build and wrap tightly in parchment for up to 2–3 hours.

Can I substitute dried rosemary?

Fresh rosemary is best for aroma and texture. If needed, use 1/3 the amount of dried rosemary (very finely crushed) and let the mayo sit at least 10 minutes to hydrate. Consider adding a touch more lemon zest to brighten the flavor and balance the dried herb.

What’s a good vegetarian or vegan swap for bacon?

Try crisp tempeh bacon, coconut bacon, or mushroom “bacon” (thinly sliced shiitakes roasted with soy, maple, and smoked paprika). For vegan, pair with plant-based mayo and add avocado for richness. Season assertively so the sandwich retains that classic savory-salty balance.

Conclusion

When summer tomatoes are at their peak, this rosemary mayo turns a simple BLT into a sandwich you’ll crave. Keep the ingredients top-notch, toast the bread well, and don’t skimp on the herbed spread. Quick, satisfying, and endlessly adaptable—this is your new go-to BLT.