How long to simmer carrots and potatoes depends on how you cut them and what you’re making.
If you’re aiming for a tender stew or a creamy soup, carrots and potatoes usually need somewhere between 15 and 25 minutes of gentle simmering.
That said, there’s a lot of small detail that changes the answer, and knowing how long to simmer carrots and potatoes really comes down to size, texture, and the dish you have in mind.
In this post, we’ll walk through exactly how long to simmer carrots and potatoes, plus the tricks that keep them from turning to mush.
Let’s get to it.
How Long to Simmer Carrots and Potatoes Explained
So how long should you simmer carrots and potatoes?
As a general rule, simmer carrots and potatoes for about 15 to 20 minutes when they’re diced into bite-sized cubes.
If you leave them in larger chunks, plan on 25 to 30 minutes of simmering.
Whole baby potatoes and thick carrot coins can take up to 35 minutes.
The simmer itself matters too, and you want a gentle bubble, not a rolling boil that batters the vegetables around.
Here’s why:
1. Carrots and Potatoes Have Different Densities
Carrots are dense and fibrous, so they often take a few minutes longer than potatoes to soften.
Potatoes are starchier, and their cells break down faster once heat penetrates them.
That’s why, if you simmer carrots and potatoes together in equal-sized pieces, the potatoes usually finish first.
Knowing this helps you time when to add each one.
2. Cut Size Changes Everything
The smaller you cut carrots and potatoes, the faster they simmer.
Diced carrots and potatoes cook in about 15 minutes, while quartered potatoes and chunky carrot pieces need closer to 25 or 30 minutes.
If you want both to finish at the same time, cut them into similar-sized pieces.
This is the single biggest factor in how long to simmer carrots and potatoes.
3. Fresh vs. Older Vegetables
Fresh carrots and potatoes from the store tend to simmer in the standard 15 to 25 minute range.
Older, stored vegetables can be drier and take a bit longer to soften.
So if your carrots have been sitting in the fridge for a couple of weeks, give them a few extra minutes.
4. The Dish You’re Making Sets the Target
For a soup or stew, you want carrots and potatoes tender enough to pierce with a fork but still holding their shape.
For mashed potatoes or a pureed soup, you can simmer them longer, around 25 to 30 minutes, until they’re completely soft.
So the “right” simmer time always depends on the final texture you want.
How to Simmer Carrots and Potatoes Perfectly
Getting the timing right is one thing, but technique matters just as much.
Here’s how to simmer carrots and potatoes so they come out tender and flavorful every time:
1. Start With Cold Water and Salt
Place your cut carrots and potatoes in a pot and cover them with cold water by about an inch.
Add a generous pinch of salt, which seasons them from the inside out.
Starting with cold water helps them cook evenly instead of shocking them in already-boiling water.
2. Bring to a Boil, Then Reduce to a Simmer
Turn the heat to high and bring the pot to a boil.
Once it boils, lower the heat so the water is gently bubbling.
A hard boil can break the vegetables apart, so keep it calm.
3. Check Them Early and Often
Start testing carrots and potatoes with a fork around the 12-minute mark.
If the fork slides in easily, they’re done.
If there’s resistance, give them another 3 to 5 minutes and check again.
4. Add Carrots First If They’re Chunky
When carrots are cut thick and potatoes are diced small, drop the carrots in a few minutes before the potatoes.
That way both finish at the same time instead of one turning mushy.
5. Drain and Season Right Away
Once they’re tender, drain the carrots and potatoes immediately so they don’t keep cooking in hot water.
Then toss them with butter, herbs, or olive oil while they’re still warm.
Common Mistakes When You Simmer Carrots and Potatoes
Even simple simmering can go sideways if you’re not careful.
The biggest mistake is walking away and letting the water boil hard, which shreds the vegetables.
Another is cutting carrots and potatoes into wildly different sizes, which means one is done while the other is still hard.
Undersalting the water is a quiet culprit too, leaving everything tasting flat.
Overcrowding the pot also slows cooking and steams the vegetables instead of simmering them.
Avoid these and your carrots and potatoes will turn out just right.
So, How Long to Simmer Carrots and Potatoes?
Carrots and potatoes usually simmer for about 15 to 25 minutes, depending on how large you cut them and how soft you want them.
Diced pieces finish in about 15 minutes, while larger chunks take 25 to 30 minutes.
Start with cold salted water, keep the pot at a gentle simmer, and test with a fork early.
Follow those simple steps and you’ll never have to guess how long to simmer carrots and potatoes again.