How Many Carbs In Mushrooms? | Carb Numbers By Type

Most fresh mushrooms run 2–6 g total carbs per 100 g, and some of that is fiber.

Mushrooms can taste rich and meaty, yet their carb load stays modest. Still, “mushrooms” isn’t one food. White button, cremini, portabella, shiitake, and oyster mushrooms don’t land on the same numbers, and the way you measure them (by cup, by weight, raw vs. cooked) can swing what you log.

This guide breaks down mushroom carbs in a way you can use at the stove and at the table. You’ll get carb ranges by type, serving-size shortcuts, and the small details that change the total—like trimming water during cooking or picking a sauce that quietly adds sugar.

What Counts As Carbs In Mushrooms

When nutrition labels list “Total Carbohydrate,” that number usually includes three pieces: sugars, starches, and dietary fiber. Mushrooms don’t carry much starch, and their sugars are modest too. A chunk of the carbs in many mushrooms comes from fiber and other carbohydrate structures in the cell walls.

If you track “net carbs,” you’ll usually subtract fiber from total carbs. That’s a personal tracking choice, not a rule, so it helps to be consistent across foods. If you track total carbs, mushrooms still tend to be a low-carb pick, just not “zero.”

Why Mushrooms Can Taste Big With Small Carb Numbers

Mushrooms bring savory flavor from natural glutamates and their texture changes fast with heat. That combo makes them feel filling without needing breading, flour, or starchy sides. The carbs you do see often come from what you cook them with: glazes, bottled marinades, sweet sauces, or a heavy hand with onions and carrots.

Carbs In Mushrooms By Type And Serving Size

Carb numbers are easiest to compare on the same base: 100 grams. That’s a kitchen scale-friendly amount, and it avoids the “one cup” problem where pieces vary in size and packing. In general, white button and portabella tend to sit on the lower side, while oyster and shiitake often run higher.

Here are practical baselines pulled from widely used nutrition references that trace back to USDA datasets. Treat them as solid starting points, then adjust for your exact brand, trim, and cook method.

Serving Size Shortcuts That Keep You Sane

If you don’t want to weigh every time, use these quick mental anchors:

• Raw sliced mushrooms: one loosely filled cup is often near 70–90 g.
• Whole small mushrooms: a cupped handful often lands near 60–80 g.
• Cooked mushrooms: volume shrinks as water cooks off, so a cup cooked can hold more mushroom “mass” than a cup raw.

Those shortcuts won’t be perfect, but they keep you close enough for day-to-day tracking—especially if mushrooms aren’t your main carb source in the meal.

Raw Mushroom Carb Ranges You’ll See Most Often

Most common fresh mushrooms land in a narrow lane: roughly 2 to 6 grams of total carbs per 100 grams. That’s why mushrooms show up so often in lower-carb meals, veggie-heavy bowls, egg dishes, and stir-fries.

To ground that range, here’s a broad table with popular varieties, typical carb numbers per 100 grams, and a plain-English note about what to watch for when you cook or buy them.

Mushroom Type	Typical Total Carbs (Per 100 g)	Notes For Real-Life Cooking
White Button	~3.3 g	Mild flavor; easy to over-sauce, which can add sugar fast.
Cremini (Baby Bella)	~3–4 g	Close to white button; earthier taste can carry simple seasoning.
Portabella	~4.4 g	Bigger cap means bigger portions; great for stuffing without bread crumbs.
Shiitake (Fresh)	~6.8 g	Stronger flavor; stems can be tough, so you may trim weight before cooking.
Oyster	~6.1 g	Delicate frills shrink fast; check sauces since they soak up flavor.
Enoki	~7–8 g	Long thin clusters; easy to portion by weight, not by “handful.”
Maitake (Hen Of The Woods)	~5–7 g	Frilly texture; roasts well with oil and salt, no sugar needed.
Lion’s Mane	~3–6 g	Often sold in bigger chunks; slice and weigh for steady tracking.

Notice how tight the spread is. The jump from a lower-carb mushroom to a higher-carb one is still small next to common sides like rice, pasta, potatoes, or bread. The bigger swing usually comes from what’s on the mushrooms, not the mushrooms themselves.

How Cooking Changes The Numbers On Your Plate

Cooking doesn’t create carbs inside the mushroom. What it does change is water. Mushrooms are water-heavy, so when you sauté or roast them, they shrink. That means a cooked cup can represent more grams of mushroom than a raw cup.

If you track by weight, you’re fine—100 grams is still 100 grams. If you track by volume, cooked mushrooms can look “denser,” so the carbs per cup can rise because you’ve packed more mushroom mass into the same space.

Quick Rule For Sautéed Mushrooms

If your tracker gives carbs per 100 grams raw and you weigh mushrooms raw before cooking, stick with that weight. It keeps the math clean. If you weigh after cooking, use cooked entries in your tracker where possible.

Watch The Pan Add-Ins

The pan is where mushroom carbs often get miscounted. A splash of wine is usually low in sugar once it reduces, but a bottled teriyaki, sweet chili sauce, or a honey glaze can add a lot. Flour for thickening and bread crumbs for topping can push a “low-carb mushroom side” into a different lane.

Net Carbs Vs. Total Carbs For Mushrooms

Mushrooms contain fiber, and that fiber can be a meaningful slice of the total carb count. If you track net carbs, your mushroom number will drop after subtracting fiber. If you track total carbs, you’ll keep the label number as-is.

Either way, mushrooms tend to fit cleanly into lower-carb patterns. The main win is that they add volume and savory flavor without needing starchy fillers.

When Net Carbs Matter Most

If you’re keeping carbs tight for personal targets, the “fiber share” can feel like a bonus. A bowl of sautéed mushrooms can taste big while the net carbs stay modest. If your goal is steady tracking for overall intake, total carbs is simpler and keeps your logs consistent across foods.

Table Of Common Portions And Carb Estimates

Most people don’t eat exactly 100 grams of mushrooms at a time. You eat a handful in an omelet, a cup in a pasta, or a big portabella cap as a burger stand-in. This table turns the 100-gram idea into portions you’ll actually use.

Portion	What It Usually Looks Like	Carb Estimate (Typical Range)
1/2 cup sliced, raw	Loose pile of slices	~1–2 g total carbs
1 cup sliced, raw	Loosely filled measuring cup	~2–4 g total carbs
1 cup cooked	Sautéed or roasted, shrunken volume	~3–6 g total carbs
1 large portabella cap	Single “burger-size” cap	~3–7 g total carbs
2 cups raw, sliced	Big salad add-in	~4–8 g total carbs
8 oz (227 g) raw	One common store package	~6–14 g total carbs

Use these as planning numbers. If you want tighter tracking, weigh your mushrooms once or twice at home, note what your “usual cup” weighs, and reuse that personal shortcut.

Fresh Vs. Canned Vs. Dried Mushrooms

Fresh mushrooms are the simplest to track. Canned mushrooms can be similar in carb count, but check the label for added ingredients. Some canned varieties include sugar in the brine, while others don’t.

Dried mushrooms are a different story. Drying removes water, so the carbs per 100 grams of dried mushrooms look much higher. That doesn’t mean a dish suddenly becomes high-carb. You rarely eat 100 grams dried. You might use 10–20 grams dried, then rehydrate them and spread them across a whole pot of soup or sauce.

Tracking Tip For Dried Mushrooms

Log dried mushrooms by the dry weight you used, not the rehydrated weight. Rehydrated weight is mostly water, and it can make entries confusing.

Low-Carb Ways To Cook Mushrooms That Still Taste Great

Mushrooms love high heat and simple seasonings. If you’re keeping carbs low, the goal is to build flavor with fat, salt, acid, herbs, and browning instead of sweet sauces.

Sauté Method For Deep Flavor

1. Heat a skillet until it’s hot, then add a little oil or butter.
2. Add sliced mushrooms in a single layer when you can. Crowding steams them.
3. Let them sit for a minute or two to brown, then stir.
4. Salt near the end if you want stronger browning early.
5. Finish with pepper, garlic, thyme, or a squeeze of lemon.

This method keeps carbs low because you’re not leaning on sugar. You’re leaning on browning and seasoning.

Roasting Method That Concentrates Flavor

1. Heat the oven to 425°F.
2. Toss mushrooms with oil, salt, and pepper on a sheet pan.
3. Roast until edges brown and the pan looks drier, stirring once.
4. Finish with herbs or grated cheese if that fits your meal plan.

Roasting is handy for meal prep. You can roast a whole tray, then add mushrooms to eggs, bowls, salads, or wraps through the week.

Where Mushroom Carbs Sneak Up On People

Mushrooms don’t usually create tracking surprises. The surprises come from pairings and prep choices.

Stuffed Mushrooms

Stuffed mushrooms can stay low-carb if you use cheese, sausage, spinach, herbs, and chopped stems. Bread crumbs and sweet sauces raise carbs fast. If you want crunch, chopped nuts or pork rinds can work in some recipes.

Mushroom Sauces

Creamy mushroom sauces can be low-carb until flour or starch enters the pan. If you want thickness without flour, reduce the sauce longer, or use a small amount of cream cheese or grated cheese to thicken.

Restaurant Mushroom Sides

Many restaurant mushrooms arrive glazed. If the mushrooms look shiny and taste sweet, expect extra carbs from sugar in the sauce. If you’re unsure, ask for them sautéed with butter, garlic, and herbs.

Smart Buying And Storage For Better Results

Mushrooms can get slimy fast if they sit in trapped moisture. Store them in the fridge with airflow. A paper bag or the original package with a loose paper towel can help keep them dry. For a quick refresher on handling and seasonal notes, check the USDA’s mushroom produce page at USDA SNAP-Ed’s mushrooms guide.

When you’re ready to cook, brush off dirt or wipe with a damp towel. A quick rinse is fine if you dry them well. Then slice and cook hot so they brown instead of steaming.

Practical Takeaways For Carb Tracking

If you want one clean number to remember: many fresh mushrooms sit near 3–6 grams of total carbs per 100 grams, depending on the type. That’s a small load for the volume and flavor you get.

If you want tighter logs, weigh mushrooms raw once, learn what your “usual cup” weighs, and reuse that shortcut. If you want simpler meals, cook mushrooms with browning, herbs, and fat instead of sweet sauces.

For deeper nutrition lookup by exact food entry, the dataset most trackers pull from is USDA FoodData Central. It’s a handy place to check the numbers for a specific mushroom type and serving weight when your tracker entries don’t match.