Learn how to make Japanese Curry Roux from scratch. Only 5 ingredients! This easy recipe will have you cook up many delicious pots of Japanese curry.
Japanese curry (also known as Curry Rice/Kare Raisu/カレーライス) is the ultimate comfort dish. It is the staple meal for many Japanese households because it’s so easy to make at home.
The convenience comes from the readily made Japanese Curry Sauce Mix or curry roux (カレールー), which allows you to cook up the stew-like curry consists of meat & vegetables in the shortest time.
What is Japanese Curry Roux?
The curry roux in block form was first introduced by S&B Foods in 1956. It refers to a solidified mixture of sauce, made with fat, flour, and curry spices as the base flavor.
These days we can even find many varieties of instant Japanese curry roux in the Asian aisle at the American supermarkets.
The boxed curry roux often comes in a distinctive block that resembles a thick chocolate bar, where you break off individual cubes for the portion you need to make. Some of the common brands include S&B’s Golden Curry, House’s Vermont Curry, Java Curry, and Torokeru Curry.
Homemade Japanese Curry Roux
Although the boxed stuff may spare you some time in the kitchen, you’ll be surprised at how easy it is to make your own Japanese Curry Roux at home. And just like all curries, curry roux is best made from scratch. The other good reasons for homemade roux?
- No MSG, artificial flavors and other food additives that are commonly found in boxed mixes.
- You can customize the flavor, spice level and thickness to your preferred taste each time you make it.
How to Make Japanese Curry Roux
Ingredients You’ll Need
My recipe for Japanese curry roux requires only five ingredients that you will have in the pantry. They are:
- Unsalted butter
- All-purpose/plain flour
- S&B Japanese curry powder
- Garam masala
- Cayenne pepper (optional for spice)
You can use salted butter for making the curry roux, but do adjust the amount of salt in the curry recipe you’re making. I like adding salt to my liking whenever I cook, so I only keep unsalted butter at home.
Why Do We Combine Curry Powder and Garam Masala?
I have made homemade curry roux with just the S&B Japanese curry powder in the past, and it works great.
However, I wanted to make my own curry roux blend without having to buy spices that I won’t necessarily use for my daily cooking. One day in my pantry, I found a bag of garam masala I purchased from my local Indian grocery store and I just mixed that into my curry roux. Garam masala added a wonderful fragrance and depth to the roux!
Since then, for the past 10 years, I’ve been using these two spice blends as my base for my curry roux. You can play around with the spices I listed on my pantry page for Japanese curry powder. Make your own blend for fun!
You’re probably wondering about the curry powder and garam masala, so I’ll cover these topics later in the post.
Overview: Cooking Steps
The roux is made with butter and flour that helps to thicken the broth. For curry roux, we start by cooking the butter and flour mixture for a long time until it turns brown, somewhat chocolate color, about 25-30 minutes.
When you add the curry powder, garam masala, and cayenne pepper to the roux, you’ll get delicious homemade curry roux.
The butter gives a rich sweet flavor while the toasted flour brings nuttiness. Feel free to modify the amount of the spices to your preference.
How to Store Homemade Japanese Curry Roux
The roux can be made ahead and store in the refrigerator for a week or in the freezer for 3-4 weeks. I recommend cutting the block of roux into cubes so you can add pieces as you need in your curry recipe.
Japanese Curry Powder
The most notable Japanese curry powder is the S&B brand that comes in a tiny red can. It has a slightly sweet and rounded flavor, and it is the most common curry powder that many Japanese homes and restaurants use in making their curry dishes.
You can use other brands of curry powder, but to achieve the authentic Japanese flavor, I strongly recommend using S&B Curry Powder for making the homemade curry roux. These days you can buy the S&B Curry Powder on Amazon.
Can’t find S&B Curry Powder?
To learn how to make your own Homemade Japanese Curry Powder, visit this pantry page.
What is Garam Masala?
Garam masala is a warming spice with a sharp and pungent flavor and this spice blend is used to add flavor and color to dishes. Depending on spice shops or home recipes, the blend varies. It typically contains:
- Cardamom
- Cinnamon
- Clove
- Coriander
- Cumin – nice to add more for curry
- Mace
- Mustard seeds
- Nutmeg
- Peppercorns
- Red chili pepper
Some of the spices overlap with Japanese curry powder and that’s okay. You can always tweak your own homemade curry powder blend as you like through trial and error.
What to Make with Japanese Curry Roux
With the homemade curry roux, you will be eager to start cooking a myriad of Japanese curry dishes at any time. Here are some delicious recipes you can make with homemade curry roux:
- Instant Pot Japanese Curry
- Soup Curry
- Japanese Chicken Curry
- Japanese Beef Curry
- Japanese Seafood Curry
- Katsu Curry
- Curry Udon
- Cold Curry Udon
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How To Make Japanese Curry Roux
Video
Ingredients
- 3.5 oz unsalted butter (7 Tbsp)
- 3.5 oz all-purpose flour (plain flour) (¾ cup; use gluten-free flour for GF)
- 4 Tbsp Japanese curry powder (Use S&B Curry Powder for that familiar Japanese curry flavor; you can buy on Amazon)
- 1 Tbsp garam masala (Can't find it? You can skip and add more curry powder, or try adding other spices I mentioned in the blog post that you may have)
- ½ tsp cayenne pepper (optional for spicy)
Instructions
- Gather all the ingredients. Use a kitchen scale to measure the weight of butter and flour. Depending on how you scoop the flour, the amount varies. If you don't have a kitchen scale, see this post for how to measure flour.
To Make Brown Roux
- In a small saucepan, melt the butter over low to medium-low heat (you can also cut the butter into small pieces first).
- When the butter is completely melted, add the flour. Stir to combine the butter and flour.
- Soon the butter and flour will fuse and swell. Cook for 20-25 minutes over low heat. Stir frequently because the roux burns easily. You can change to a whisk and mix vigorously if you feel the mixture is separating.
- The roux will become brown color. You can even go for a bit darker color (watch my video).
To Make Curry Roux
- Add curry powder, garam masala, and optional cayenne pepper.
- Cook and stir for 30 seconds and remove from the heat. You can use the roux immediately if you like (see the instructions below).
To Shape into a Block (This requires overnight process)
- Transfer the roux to a glass or metal container lined with parchment paper. Let cool completely on the kitchen counter, then refrigerate to solidify overnight.
- On the following day, take out the curry block from the container. If the curry block gets stuck to the container, loosen it up with a butter knife or an offset spatula.
- With a sharp knife, cut the block into eight 1-inch (2.5 cm) cubes. Store the cubes in a glass container.
To Store
- Store the container with curry cubes in the refrigerator for 1 month and in the freezer for 3-4 months. Use them sooner before losing the flavor and fragrance.
To Use in Curry Recipe
- Very important! Please do not forget to season your final dish with salt as the homemade roux is not salted. I usually add about 1 Tbsp salt to the broth (ranges from 2 tsp to 4 tsp depending on the recipe). Store-bought roux is quite salty if you want to achieve a similar taste.
- Add the curry roux mixture (before solidifying) or cubes to the broth of your curry recipe (follow the recipe instructions on when to add the roux).
- How much mixture or how many cubes should we use? I think roughly 6-7 cubes are equivalent to one box of store-bought curry roux (that requires 4 cups or 1L of broth/water). Simmer over low heat, for 5-10 minutes. Heat will thicken the roux.
- If the curry flavor is lacking or the curry does not get thicken, add more roux. When you add more meat/veggies, more moisture is released to the broth; therefore, you will need to adjust the amount of roux according to what you're cooking.
Notes
Nutrition
Editor’s Note: The post was originally published on March 18, 2013. The video and new images were added in August 2018. The recipe was revised and the post was updated with new images and blog content in October 2021.
