A traditional Caesar salad is close to low FODMAP but not quite there without a few adjustments. The base of romaine lettuce, aged hard cheese, and anchovies are all naturally low in FODMAPs. The two problem ingredients are the garlic in the dressing and the wheat-based croutons, both of which can trigger symptoms for people with IBS or FODMAP sensitivity.
What’s Already Safe in a Caesar Salad
Romaine lettuce is one of the most FODMAP-friendly vegetables you can eat. Even generous portions, up to about five cups, stay well within safe limits. It contains virtually no fermentable carbohydrates, so the leafy base of the salad is never a concern.
Aged hard cheeses like Parmesan and pecorino are also low FODMAP in normal serving sizes. During the aging process, bacteria consume most of the lactose. A 30-gram serving of well-aged Parmesan contains less than 1 gram of total carbohydrates, compared to over 12 grams in the same amount of milk. That makes the cheese shavings on top perfectly fine for most people following the diet. Anchovies, another classic Caesar ingredient, are a simple protein with no FODMAP content at all.
The Two Ingredients That Cause Problems
Garlic is the biggest issue. Traditional Caesar dressing calls for raw garlic, and garlic is one of the highest-FODMAP foods that exists. The problematic compounds in garlic are fructans, a type of carbohydrate that dissolves in water but not in oil. Even small amounts of raw garlic in a dressing can trigger bloating, gas, and abdominal pain in sensitive individuals.
Standard croutons are the other culprit. They’re made from wheat bread, which contains fructans from the wheat itself. A typical handful of croutons can push a meal past the low FODMAP threshold. This is especially true for larger restaurant portions where croutons are scattered generously across the top.
How to Make It Low FODMAP
Solving the garlic problem is straightforward: use garlic-infused oil instead of whole garlic cloves. Because fructans are water-soluble but not fat-soluble, infusing oil with garlic and then straining out the solids gives you the flavor without the FODMAPs. This is one of the most useful tricks in low FODMAP cooking, and it works perfectly in a creamy Caesar dressing. Combine the infused oil with egg yolk, lemon juice, Dijon mustard, and anchovy paste for a dressing that tastes like the real thing.
For croutons, you have two options. You can make your own from spelt sourdough bread or a certified gluten-free bread that’s also low FODMAP, cubed and toasted in garlic-infused oil. Or you can skip bread entirely and use toasted walnuts, pecans, or pepitas (pumpkin seeds) for crunch. The Monash University FODMAP team specifically recommends these nut and seed alternatives in their own Caesar salad recipe. They add texture and healthy fats without any fructan content.
For the cheese component, both Parmesan and pecorino work well. Keep your portion to around 30 to 40 grams, roughly a few tablespoons of shaved cheese, and you’ll stay comfortably in the low FODMAP range.
Ordering Caesar Salad at a Restaurant
Restaurant Caesar salads are almost always high FODMAP because the dressing is premade with fresh garlic, and the croutons are standard wheat bread. You can’t easily ask a kitchen to remake their house dressing, so the safest approach is to order the salad without dressing and without croutons, then add your own dressing from home. A small jar or squeeze bottle of homemade low FODMAP Caesar dressing travels well and saves you from either skipping the salad or risking symptoms.
If bringing your own dressing isn’t an option, ask for olive oil and lemon juice on the side as a simple alternative. You’ll lose the signature Caesar flavor, but the romaine, cheese, and anchovies still make a satisfying salad. Some restaurants will let you keep the Parmesan shavings on top, which helps. The key request is always: no croutons, dressing on the side (or none at all).
Chicken and Other Add-Ons
Grilled chicken, the most common Caesar salad addition, is naturally FODMAP-free as a plain protein. The risk comes from marinades or seasonings the kitchen uses, which often contain garlic powder, onion powder, or honey. When ordering, ask for plain grilled chicken if possible. At home, season chicken with salt, pepper, and herbs like oregano or thyme, all of which are safe.
Bacon bits, hard-boiled eggs, and capers are other common additions that are all low FODMAP. Avoid adding cherry tomatoes in large quantities (more than about five), as they can start to accumulate fructose. A few sliced tomatoes for color are fine.