Tomato Sandwich
A Southern summer staple that lets peak-season tomatoes shine. Thick, juicy slices of ripe tomato nestled between soft white bread slathered with creamy mayonnaise, finished with a crack of black pepper and flaky salt. Simple, nostalgic, and ready in 5 minutes.
For 4 servings
- prep · ~2 min
Slice the tomatoes.
Using a serrated knife, slice each large tomato into ½-inch thick rounds. Aim for 2-3 good slices per sandwich. Discard the stem end and any bruised spots.
TIPA serrated knife grips the tomato skin so you get clean slices without squashing the flesh. - prep · ~1 min
Lay out the bread slices.
Place all 8 slices of soft white bread on a clean work surface. You will build 4 open-faced halves then close them.
- assemble · ~1 min
Spread mayonnaise generously on every slice.
Spread about 1 tablespoon of mayonnaise evenly from edge to edge on each slice of bread. For a proper Southern tomato sandwich, do not skimp — the mayo acts as a barrier protecting the bread from tomato juices.
TIPRoom-temperature mayo spreads easier and tears the bread less. Pull it out when you start slicing tomatoes. - assemble · ~1 min
Layer tomato slices on half the bread.
Arrange the thick tomato slices over 4 of the mayo-slathered bread slices. Use enough tomato to cover the bread in a single, slightly overlapping layer.
- assemble
Season the tomatoes generously.
Sprinkle each set of tomato slices with a pinch of flaky salt and a crack of fresh black pepper. The salt draws out the tomato's natural sweetness — this step makes the sandwich.
TIPSeason the tomato layer, not the mayo. Salt needs direct contact with the fruit to work its magic. - assemble · ~1 min
Close the sandwiches and slice.
Top each sandwich with the remaining mayo-spread bread slices, mayo-side down. Press gently. Slice diagonally with the serrated knife and serve immediately while the bread is still soft and the tomatoes are cool.
TIPDiagonal cuts expose more tomato and just taste better — no one knows why, but it's true. - serve
Serve right away on a plate with a napkin.
These sandwiches wait for no one. Eat over a plate — the juices will run. A napkin is non-negotiable.
What to keep in mind.
6 tips from the recipe — small details that make a real difference to the final dish.
- 1Use tomatoes at room temperature for maximum flavor; never refrigerate them before slicing.
- 2Spread mayonnaise edge-to-edge to create a moisture barrier that keeps the bread from getting soggy.
- 3Season the tomato slices directly with salt and pepper, not the mayo, so the salt can draw out juices.
- 4Assemble the sandwich just before serving; a standing tomato sandwich turns into a soggy mess within minutes.
- 5For the best texture, slice tomatoes ½-inch thick — too thin and they vanish, too thick and the sandwich falls apart.
- 6If you can't find Duke's, use another full-fat mayo; low-fat versions are too thin to protect the bread.
Adapt it for your goals.
Herb-Infused
Add a few fresh basil leaves or a sprinkle of dried oregano on top of the seasoned tomatoes for an aromatic, Italian-accented twist.
ToastedToasted
Lightly toast the bread before spreading mayo for a sturdier, crunchier sandwich that holds up to extra-juicy heirloom tomatoes.
Bacon & AvocadoBacon & Avocado
Add crispy bacon strips and sliced avocado for a richer, more substantial sandwich that still lets the tomato be the star.
Vegan/Plant BasedVegan/Plant-Based
Swap the mayo for a good-quality vegan mayo (such as Just Mayo or homemade cashew mayo) for a fully plant-based version that tastes just as creamy.
Gluten FreeGluten-Free
Use sturdy gluten-free bread or a large lettuce leaf as the carrier; still spread the mayo to prevent sogginess.
Why this is on our healthy list.
Rich in Lycopene
Tomatoes are packed with lycopene, a powerful antioxidant linked to heart and skin health, especially when eaten with a little fat (like the mayo).
Good Source of Vitamin C
A single large tomato provides about 40% of your daily vitamin C needs, supporting immune function and collagen production.
Low Calorie Base
At only about 22 calories per half-cup of sliced tomato, this sandwich lets you enjoy a satisfying meal without heavy calorie load.
Hydrating Ingredients
Tomatoes are over 90% water, making this a hydrating, light summer sandwich perfect for hot days.
Frequently asked questions
Full-fat mayo has the right emulsion to create a waterproof barrier on the bread. Low-fat versions are too thin and watery to block tomato juice, leading instant sogginess.
