Convert Portobello Mushroom from Cups (chopped) to US cups (chopped)

Portobello Mushroom converter

Use the tool below to convert portobello mushroom from Cups (chopped) to US cups (chopped).

A small portobello cap is well under half the weight of a giant burger-sized one, so 'four portobellos' on the grill can swing the yield a lot. Pick the right size below to keep burgers, fajitas, and stuffing on target.

How many US cups is 1 cup of portobello mushroom?

One cup of portobello mushroom is 1.05 US cups. A US cup holds 240 ml and a metric cup 250 ml, so the gap is small and fixed for any ingredient. Use the converter above for any amount, or the volume converter linked below for millilitres, tablespoons and more.

Got white button or cremini? Those are smaller (10–27 g whole). See our Mushroom converter.

No measuring cups? The tool below gets you close, and a measuring cup set keeps every batch the same.

Scoop it right, get measuring cups

Enter an amount, pick your units, and set the size for counting whole portobello mushrooms.

Size applies to whole portobello mushrooms (small / medium / large).

Result

1.05 cups (US)

Common Portobello Mushroom conversions

Quick reference for portobello mushroom at medium size. Switch the size in the converter above for small or large.

Cups (chopped)US cups (chopped)
0.25 cups0.26 cups (US)
0.5 cups0.52 cups (US)
0.75 cups0.78 cups (US)
1 cup1.05 cups (US)
1.5 cups1.57 cups (US)
2 cups2.09 cups (US)
3 cups3.14 cups (US)

Portobello Mushroom conversion chart

The chart below shows how whole portobello mushrooms (medium size) convert to cups, grams and ounces.

cupscups (US)portobello mushroomsgozlbkg
0.25 cups0.26 cups (US)0.19 portobello mushrooms22.5 g0.79 oz0.05 lb0.02 kg
0.5 cups0.52 cups (US)0.38 portobello mushrooms45 g1.59 oz0.1 lb0.05 kg
1 cup1.05 cups (US)0.75 portobello mushrooms90 g3.17 oz0.2 lb0.09 kg
1.5 cups1.57 cups (US)1.13 portobello mushrooms135 g4.76 oz0.3 lb0.14 kg
2 cups2.09 cups (US)1.5 portobello mushrooms180 g6.35 oz0.4 lb0.18 kg

Portobello Mushroom varieties and best uses

The conversions above are the same whatever variety you use; the difference is what each is good for. Here is how the common portobello mushroom varieties compare.

VarietyBest for
Portobello (Standard)Burgers, grilling, and stuffing: mature brown cap with deep gills, dense and meaty when cooked.
King OysterVegan scallops and steaks: thick white stems that take a sear; closest meaty substitute when portobello is out.
Lion's ManeVegan crab cakes and steak swaps: shaggy white clusters that pull apart into a tender, almost seafood-like texture.

Which should I pick?

For burgers, grilling, and stuffing, the standard mature Portobello cap is the pick: dense, meaty flesh that holds up under heat. No portobello? Thick-cut King Oyster gives a similarly meaty bite. For a vegan steak swap, Lion's Mane has a tender, almost crab-like texture.

Frequently Asked Questions

How many US cups is 1 cup of portobello mushroom?
One cup of portobello mushroom is 1.05 US cups, and two cups are 2.09 US cups. A US cup holds 240 ml against a metric cup's 250 ml, so the gap is small and the same for any ingredient. Use the converter above for any cup amount of portobello mushroom. Open the portobello mushroom converter
How do I convert cups to US cups for any recipe?
Switching between metric cups and US cups is a fixed volume ratio that applies to any ingredient, since one US cup is 240 ml and one metric cup is 250 ml. The volume converter at the link below covers cups, US cups, millilitres, tablespoons and teaspoons in both directions. Cups to US cups converter
What is the difference between a metric cup and a US cup?
A metric cup holds 250 ml while a US cup holds 240 ml, so a US cup is 4% smaller. For chopped portobello mushroom that gap is small but real, and it adds up across several cups. The guide linked below explains when the difference matters and how to switch between the two so a recipe lands right whichever cup you own. metric v US cup
Which portobello mushroom variety should I use?
For burgers, grilling, and stuffing, the standard mature Portobello cap is the pick: dense, meaty flesh that holds up under heat. No portobello? Thick-cut King Oyster gives a similarly meaty bite. For a vegan steak swap, Lion's Mane has a tender, almost crab-like texture.

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