The Ultimate BLT Sandwich with Herb Mayo on Sourdough

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Make the best BLT sandwich at home with crispy bacon, juicy tomatoes, fresh lettuce, and homemade herb mayo on toasted sourdough bread. A simple, from-scratch recipe that’s packed with flavor.

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There’s nothing quite like a classic BLT sandwich—crispy bacon, juicy tomatoes, crunchy lettuce, and creamy mayo layered between toasted bread. It’s simple, timeless, and oh-so satisfying. But when you make it with fresh, whole ingredients, homemade herb mayo, and hearty sourdough bread, this everyday sandwich transforms into something unforgettable.

I love creating recipes that are quick enough for busy weeknights yet flavorful and impressive enough to serve to guests—and this BLT is the perfect example. With just a few upgrades—like my homemade sourdough bread and herb mayo—you’ll have a sandwich that tastes restaurant-worthy, right from your own kitchen.

Why You’ll Love This BLT Sandwich

• Simple & quick – ready in about 15 minutes.
• Packed with flavor – herb mayo adds a fresh, herby kick.
• Made with real ingredients – crisp lettuce, ripe tomatoes, and hearty sourdough.
• Customizable – add avocado, a fried egg, or your favorite twist.

Ingredients You’ll Need

• 8 slices sourdough bread – I recommend my Homemade Sourdough Bread (or use a good crusty loaf).
• ½ cup homemade herb mayo – Don’t skip this – my Herb Mayo Recipe is the perfect spread to elevate these BLTs.
• 2 packages of bacon (about 16 slices, depending on the brand).
• ¼–½ cup plain mayonnaise. – I usually measure this with my heart and the exact amount doesn’t matter.
• 4 lettuce leaves – any variety you love (green leaf, romaine, butter, or iceberg all work well).
• 8 slices tomato – ripe, juicy, and in-season for the best flavor.

Step-by-Step Instructions

1. Cook the Bacon
   • Fry in a skillet or bake in the oven until crispy. Drain on a paper towel–lined plate.
2. Toast the Bread
   • Spread a thin layer of plain mayo on both sides of each bread slice. Toast in a cast iron skillet or on a griddle until golden and crisp.
3. Assemble the Sandwiches
   • Spread my homemade herb mayo generously on each slice of toasted bread.
   • Layer with 4 slices of bacon, 2 slices of tomato, and 1 lettuce leaf per sandwich.
4. Serve & Enjoy
   • Place the second slice of bread on top, slice in half (if desired), and serve immediately.

Tips for the Best BLT Sandwich

• Use ripe, in-season tomatoes for the juiciest, most flavorful bite.
• Keep your lettuce cold and crisp for maximum crunch.
• Try adding a fried egg or avocado for a hearty variation.

Serving Suggestions

• Serve with homemade fries, chips, or a fresh green salad for a complete meal. Check out my full list of side dishes here!
• Perfect for an easy weeknight dinner, a quick lunch, or even a picnic sandwich.

Variations to Try

• Avocado BLT (BLAT): Add slices of creamy avocado.
• Fried Egg BLT: Top with a runny egg for a brunch-worthy twist.
• Spicy BLT: Mix hot sauce into the herb mayo or use spicy greens like arugula.

If you try this BLT Sandwich recipe and love it, I would love it if you could come back and give it 5 stars! Tag me on instagram @my.colorado.kitchen