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Home » Recipes

Modified: Sep 19, 2025 · Published: Feb 29, 2024 · This post may contain affiliate links ·

Hidden Veg Katsu Curry Sauce

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A kid-friendly Katsu Curry Sauce packed with hidden vegetables. Brilliant for getting some added nutrition into your fussy eaters!

My daughter has really been getting into curries and more spicy food lately. It's a brilliant step forward after years of rejecting them so I'm leaning into it as much as possible.

You know I'm a big fan of Hidden Veggie Recipes so I thought I would combine the two and make a Hidden Veg Katsu Sauce.

This recipe has four vegetables blended into the katsu sauce. Cauliflower, courgette, carrots and red peppers.

I did try out adding more veggies but I wanted to keep the flavour of the sauce as similar as possible to the original taste and this combo and quantity has worked out perfectly.

How To Make The Hidden Veg Katsu Sauce

The first step is to make the base of the katsu curry by frying some onions and garlic in oil.

Add in garlic along with curry powder and flour.

The amount of curry powder you use will really depend on your child's tolerance for spice. I used 2 tablespoon as my daughter likes a small amount of heat. There is a definite kick to the sauce but it's not super spicy.

However if your kids prefer a much milder sauce then try it initially with only 2 tablespoon of curry powder.

Add in honey, soy sauce and stock, along with the chopped veggies.

Bring to the boil and then simmer for 20 minutes until the veg has cooked.

Blitz the sauce until it is completely smooth.

You can either use a hand blender directly in the dish or transfer into a stand blender.

I served the sauce up with a tempura battered chicken fillet, rice and some veggies on the side.

You can either serve the sauce in it's own separate bowl like I have, or pour it over the chicken and rice, whatever your kids prefer.

If you try this recipe then please come back and let me know what you think. Add your thoughts to the comments below or tag me on social media.

I always love to hear your feedback!

If you liked this recipe you may also enjoy my Hidden Veg Chicken Satay

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Hidden Veg Katsu Curry Sauce

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 5 from 6 reviews
  • Author: Ciara Attwell
  • Prep Time: 5 minutes
  • Cook Time: 26 minutes
  • Total Time: 31 minutes
  • Yield: 12 1x
  • Category: Hidden Veg
  • Cuisine: Curry
Print Recipe

Description

A kid-friendly Katsu Curry Sauce packed with hidden vegetables. Brilliant for getting some added nutrition into your fussy eaters!


Ingredients

Scale
  • 1 tbsp oil
  • 1 onion, diced
  • 3 garlic cloves, chopped
  • 1 or 2 tbsp of mild curry powder
  • 2 tbsp plain flour
  • 2 tbsp honey
  • 2 tbsp soy sauce
  • 1 litre vegetable stock
  • 1 large carrot, diced
  • 150g courgette, diced
  • 150g cauliflower, chopped
  • 1 red pepper, chopped


Instructions

  1. Add the oil and onions to a large saucepan or casserole dish on the hob and cook for 3-4 minutes until the onions have softened.
  2. Add the garlic, curry powder and flour, mix well and cook for 1 minute.
  3. Add the honey, soy sauce and vegetable stock, along with the veggies.
  4. Bring to the boil and reduce to a simmer for 20 minutes.
  5. Use a hand blender to blitz the sauce until completely smooth. You can also transfer it into a stand blender.
  6. Serve with breaded or battered chicken, rice and veggies on the side.

Notes

This recipe makes approximately 12 small servings of the Katsu Curry Sauce. Leftovers will keep in the fridge in an airtight jar or container for up to 3 days and can be reheated on the hob or in the microwave.

The sauce can also be frozen. Defrost in the fridge overnight and reheat as above.

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Comments

  1. Carrie says

    January 16, 2026 at 7:53 pm

    Just to say firstly I never get round to leaving reviews normally. But, i had to this time, I have to say this recipe is delicious! I was skeptical with the amount of veg going in… First test was my 9 year old son, everything is a bit hit and miss with him lately and I am normally on tender hooks with new recipes. But… he said it was really nice and ate it all! I didn’t believe it for myself as I recently made another Katsu curry recipe with many less veg and it wasn’t that great! But, it was delicious and can’t believe I got loads left to freeze!

    Reply
    • Vicky says

      January 19, 2026 at 10:15 am

      This is fantastic Carrie, and a added bonus that you had plenty left over for another meal. Thank you so much for taking the time to leave your feedback.

      Reply
    • Jenny says

      February 04, 2026 at 1:09 am

      This is the first time I’ve left a recipe review, but I just wanted to say this was amazing! I did cook the onion down a bit more for added flavor, and I found I only needed 500mL of stock to get the consistency I wanted. But this recipe is one I will come back to again. I can’t believe how well the veggies worked in the sauce, and my kids loved it! Thank you so much!!!

      Reply
  2. Jen says

    November 17, 2025 at 8:02 pm

    Tasty sauce however despite following the recipe to the t our sauce was much thinner and almost watery in comparison to that on the recipe? Not sure where it went wrong, as I say I followed the recipe exactly

    Reply
    • Louise says

      January 04, 2026 at 1:32 pm

      I use 500ml of stock instead of the 1l it says. Much better. 😁

      Reply
  3. Anonymous says

    November 17, 2025 at 8:01 pm

    Tasty sauce but despit

    Reply
  4. Tilley says

    December 06, 2024 at 12:15 pm

    Perfect ! tasted Delicious.

    Reply
    • Vicky says

      December 09, 2024 at 10:26 am

      Thank you! glad you enjoyed it.

      Reply
  5. Freya T says

    May 24, 2024 at 9:39 am

    This is on the menu for tonight i'm very excited.

    Reply
    • Vicky says

      May 24, 2024 at 9:59 am

      Please let us know how it goes.

      Reply
  6. BB says

    April 18, 2024 at 11:21 am

    Extremely tasty!

    Reply
  7. Emily says

    March 26, 2024 at 4:13 pm

    We love this as a whole family

    Reply
  8. Brittany says

    February 29, 2024 at 12:17 pm

    All of my kids would defiantly eat this, going on next weeks meal plan! thank you.

    Reply

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Welcome!

Hi, I'm Ciara! I'm a food writer and cookbook author and I'm always looking for new ways to make food fun and interesting for kids!

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