Kabocha no Nimono (Simmered Kabocha Squash)

The most typical and easy way to cook pumpkin in Japan is also one of the most delicious. It’s a simple Japanese home-cooking dish called Kabocha no Nimono made from simmering Japanese pumpkin (kabocha squash) in a savoury-sweet dashi broth until tender and flavorful. Kabocha has a naturally sweet and nutty taste, so it really doesn’t need much to make it delicious, just a few simple ingredients and no complicated techniques.

What is Kabocha Squash?

Kabocha squash is a type of winter squash commonly known as Japanese pumpkin. It has hard dark green skin, orange-yellow flesh, and small seeds inside. Compared with many other types of winter squash, kabocha is sweeter and denser, with a slightly nutty flavor that reminds me of sweet potato and chestnut.

Kabocha is an everyday ingredient in Japanese kitchens. We simmer it for nimono, fry it for tempura, add it to soup and salad, or simply roast it in the oven with olive oil, salt, and pepper. Its naturally sweet flavor works especially well with savory Japanese seasonings.

Kabocha is also a nutritious veggie and a source of fiber, vitamin C, potassium, and antioxidant beta-carotene. I usually cook it with the skin because it is edible, adds color, and helps the soft flesh hold together.

How to Pick a Good Kabocha Squash

With kabocha, the newest squash is not necessarily the sweetest. After harvest, the starch gradually changes into sugar, developing the sweet flavor and fluffy hoku hoku texture we look for in Japan. Choose a kabocha that feels heavy for its size with hard dark green skin and a dry, cork-like stem.

If buying a cut piece, I look for deep orange flesh that appears dense and fairly dry rather than pale or watery.

What is Kabocha no Nimono?

Kabocha no Nimono (かぼちゃの煮物) is a classic Japanese kabocha squash recipe. Nimono means “simmered dish” in Japanese and refers to a cooking technique where vegetables, meat, or fish are gently simmered in a seasoned broth. For this dish, pieces of Japanese pumpkin are simmered in dashi, soy sauce, mirin, and sugar until the flesh becomes tender and absorbs the savory-sweet flavor.

Kabocha no Nimono is a simple dish you will often find in everyday Japanese home cooking. It is served as a side dish with rice and other dishes, and it is also a popular addition to bento because it tastes delicious even at room temperature.

Why You’ll Love This Simmered Kabocha Squash

This kabocha squash recipe needs only a handful of Japanese pantry ingredients, but it gives you plenty of flavor. The tender flesh absorbs the savory-sweet broth while the kabocha itself stays naturally sweet and slightly nutty.

It is also one of those dishes I think tastes even better after it has rested. You can make it before preparing the rest of dinner, leave it in the broth, and serve it when the meal is ready. Any leftovers can be kept in an airtight container for another meal or packed into a bento.

Ingredients for Making Kabocha no Nimono

• Kabocha squash : aka Japanese pumpkin. It’s naturally sweet, dense flesh becomes soft and creamy when gently simmered. I like to leave the dark green skin on because it helps the pieces hold their shape while cooking.
• Dashi : Forms the base of the simmering broth and adds plenty of umami without overpowering the natural flavor of the kabocha.
• Soy sauce : Adds saltiness, savory depth, and color to the broth.
• Mirin : Adds a mild sweetness and gives the simmered kabocha a lovely shine.
• Sake : Adds depth to the broth and helps bring all the flavors together.
• Sugar : Balances the soy sauce and enhances the natural sweetness of the kabocha squash.

How to Cut and Prepare Kabocha Squash

Kabocha squash has a very firm skin, so cutting a whole Japanese pumpkin can be tricky. If it is too hard to cut safely, microwave the whole kabocha for about 2 to 3 minutes to soften the skin slightly. Place it on a stable cutting board and use a sharp knife to cut around the stem and carefully cut the squash in half.

Scoop out the small seeds and stringy center with a spoon. You can save the pumpkin seeds for roasting if you like. Cut the seeded halves into even wedges, then cut them into similar-sized cubes so they cook at the same rate.

There is no need to peel all of the dark green skin because it is edible and helps the soft flesh hold its shape during simmering. I like to remove small patches of skin from each piece, which also allows the simmering broth to soak into the kabocha better.

Try Mentori

Mentori (面取り) means trimming away the sharp corners of cut vegetables. I use a small knife to lightly shave the edges from each kabocha piece.

It may seem like a small detail, but those sharp corners are the first parts to soften and break away during simmering. Rounding them slightly helps the kabocha stay neat instead of turning the broth cloudy with broken pieces.

How to Make Kabocha no Nimono

1. Prepare the kabocha squash : Cut the kabocha into even pieces as explained above. Keeping the pieces similar in size helps them cook evenly without some becoming too soft.
2. Arrange the kabocha : Place the kabocha pieces in a saucepan in a single layer with the dark green skin facing down. This helps the tender flesh keep its shape while simmering.
3. Add the broth and seasonings: Pour in the dashi, then add the sugar, sake, mirin, and soy sauce. The liquid does not need to completely cover the kabocha.
4. Bring to a simmer: Place the saucepan over medium heat and bring the seasoned dashi to a gentle simmer.
5. Cover with an otoshibuta: Place an otoshibuta (drop lid) directly over the kabocha. This helps the simmering broth circulate around the pieces so they cook and absorb the seasoning evenly.
6. Simmer gently: Reduce the heat to medium-low and simmer for about 15 minutes, or until the kabocha is tender when pierced with a skewer. Avoid stirring because the soft flesh can easily break apart. Add the soy sauce.
7. Let it rest: Remove the saucepan from the heat and leave the kabocha to rest in the broth for about 15 to 20 minutes. As it cools slightly, it will absorb more of the savory-sweet flavor.

Let the simmered kabocha rest in its broth before serving for the best flavor.

What Does Simmered Kabocha Squash Taste Like?

Kabocha squash tastes like a delicious mix of pumpkin, sweet potato, and chestnut, with a naturally sweet and slightly nutty flavor. When simmered, the dense flesh becomes soft and creamy while soaking up the savory, umami-rich dashi and sweet soy sauce broth. Its soft texture and mild sweetness also make this veggie an easy one for children to enjoy.

How to Serve Kabocha no Nimono

Kabocha no Nimono is a classic Japanese side dish that fits easily into an everyday meal. Serve the tender kabocha squash with steamed rice and miso soup, alongside grilled fish, chicken, or tofu for a simple and balanced Japanese meal.

This simmered Japanese pumpkin is delicious served warm, at room temperature, or chilled, which also makes it perfect for a Japanese bento. You can even add leftover kabocha to a salad with other veggies for an easy lunch the next day.

Variations and Substitutions

This simple kabocha squash recipe is easy to adjust depending on what you have in your kitchen. For a vegetarian or vegan version, use kombu or shiitake dashi instead of dashi made with bonito flakes.

If you prefer a more savory flavor, reduce the amount of sugar and let the natural sweetness of the Japanese pumpkin shine through. When kabocha is unavailable, you can substitute another sweet winter squash, such as buttercup or butternut squash, although the texture and sweetness will be slightly different.

For a little extra flavour, add a few thin slices of fresh ginger to the simmering broth. It pairs nicely with the sweet squash and savory soy sauce.

How to Store Simmered Kabocha Squash

Let the simmered kabocha squash cool completely, then place the leftovers with a little of the simmering broth in an airtight container. Store it in the refrigerator for up to 3 to 4 days.

You can also freeze Kabocha no Nimono, although the flesh may become slightly softer after thawing. Place the cooled pieces in a freezer-safe airtight container and freeze for up to 1 month, then thaw overnight in the refrigerator.

Kabocha no Nimono is delicious chilled or at room temperature, but you can also gently reheat it in a saucepan over low heat. For a quicker option, use the microwave in short intervals until warmed through, taking care not to overheat the soft kabocha.