Sweetened condensed milk is high FODMAP. Monash University, the leading authority on FODMAP testing, lists it as a high FODMAP food to avoid during the elimination phase of a low FODMAP diet. The main culprit is its concentrated lactose content, which is significantly higher than regular milk.
Why Condensed Milk Is High in FODMAPs
Condensed milk is made by evaporating roughly 50% of the water from cow’s milk, then adding sugar. This process doesn’t remove lactose. It concentrates it. According to the Food Standards Australia New Zealand database, sweetened condensed milk contains about 14.7 grams of lactose per 100 grams of product. For comparison, regular whole milk has around 4.7 grams of lactose per 100 grams.
Lactose is the specific FODMAP at play here. It’s a disaccharide, one of the “D” categories in the FODMAP acronym. People who malabsorb lactose lack enough of the enzyme needed to break it down in the small intestine. When undigested lactose reaches the large intestine, gut bacteria ferment it, producing gas, bloating, cramping, and sometimes diarrhea. Because condensed milk packs roughly three times the lactose of regular milk into the same volume, even a small amount can trigger symptoms.
Can You Use a Small Amount?
Some high FODMAP foods become low FODMAP at very small serving sizes. Condensed milk is tricky in this regard because it’s so concentrated. A tablespoon of sweetened condensed milk (about 20 grams) still delivers close to 3 grams of lactose, which is enough to cause symptoms for many people with lactose malabsorption. Most recipes that call for condensed milk use far more than a tablespoon, so the practical reality is that it’s difficult to keep the serving size low enough to stay in a safe range.
If you’re in the elimination phase of a low FODMAP diet, it’s best to skip condensed milk entirely. During the reintroduction phase, your tolerance for lactose may turn out to be moderate, but condensed milk is still one of the more challenging dairy products to fit into a lactose threshold because of how concentrated it is.
Low FODMAP Alternatives
Monash University recommends lactose-free milk and soy milk made from soy protein as low FODMAP dairy alternatives. These form the basis of the best substitutes for condensed milk in cooking and baking.
You can buy lactose-free condensed milk in some stores, though availability varies by region. The lactose-free versions use the same evaporation process but add lactase enzyme to pre-digest the lactose, bringing the FODMAP level down while keeping the taste and texture similar. Check the label to confirm the product specifically states “lactose-free” rather than just “reduced lactose.”
Homemade Low FODMAP Condensed Milk
Making your own is straightforward. The recipe from Noisy Guts, an Australian gut health organization, calls for 4 cups (1 liter) of lactose-free milk and 1⅔ cups (380 grams) of white sugar. You simmer the mixture until it reduces by about half, which typically takes 1.5 to 2 hours of gentle cooking with occasional stirring. The result is thick, sweet, and functionally identical to store-bought condensed milk in most recipes.
White sugar is FODMAP-friendly because it’s sucrose, which doesn’t require the same enzymatic breakdown that causes issues with lactose. You can also experiment with plant-based milks like soy milk (made from soy protein, not whole soybeans) or rice milk, though the flavor and consistency will differ slightly. Oat milk is worth noting as a caution here, since some oat milks test high in FODMAPs at larger servings due to their fructan content.
Common Recipes to Watch For
Condensed milk tends to appear in recipes where you might not immediately think to check: key lime pie, fudge, caramel sauce, Vietnamese iced coffee, tres leches cake, and many South Asian and Latin American desserts. If you’re following a low FODMAP diet and encounter any of these, the condensed milk is likely the biggest FODMAP contributor in the dish.
For caramel and dulce de leche specifically, you can make a low FODMAP version by slowly cooking your homemade lactose-free condensed milk until it turns golden brown. The caramelization process affects the sugars but doesn’t reintroduce FODMAPs. In coffee drinks, swapping condensed milk for a combination of lactose-free milk and a small amount of maple syrup gives a similar sweetness without the lactose load.