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Homemade Japanese Curry Roux

Homemade Japanese Curry Roux


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5 from 1 review

  • Author: Kyrié the Foodié
  • Total Time: 25 minutes

Description

A rich, comforting Japanese-style curry made with a homemade butter-based roux that melts into a smooth, savory sauce with balanced sweetness, depth, and warmth.

I highly recommend using a scale for this recipe. If you do not own one, you can get by, but it does make this recipe a little easier to ensure that you have an exact 1:1 ratio of butter to flour!


Ingredients

Units Scale
For the Roux:
  • 226 g (8 oz) unsalted butter (~2 U.S. sticks of butter)
  • 226 g (8 oz) all-purpose flour (~1 7/8 cups)
  • 1/2 cup curry powder
  • 2 tbsp garam masala
  • 3/4 tbsp salt (adjust later when cooking the curry)
  • 1/2 tbsp cayenne pepper (add more or less depending on spice preference - or omit completely)
Ingredients For the Curry: Note: 2 cubes (2 oz) of curry roux = ~2 servings
  • 2 oz curry roux (2 cubes)
  • 1 1/2 cups water (adjust for thickness)
  • 1/2 tbsp honey (add more for a sweeter curry)
  • 1 tbsp soy sauce
  • 2 tbsp Worcestershire sauce
  • Salt, to taste
  • Cooked diced chicken, potatoes, carrots, or other toppings of choice

Instructions

To make the curry roux:

  1. In a pan over medium heat, melt the butter completely. Add the flour and stir continuously until fully combined.
  2. Continue cooking, stirring constantly, until the roux deepens into a darker caramel color. Take your time here – it could take about 15 minutes.
  3. Add the curry powder, garam masala, salt, and cayenne pepper. Stir well to evenly distribute the spices, then remove from heat.
  4. Transfer the roux to a container lined with parchment paper or a silicone mold (I used Souper Cubes). To make portioning easier later, I like to divide the roux into ½-cup portions, which work out to about 4 oz each.
  5. Refrigerate overnight until fully hardened.
  6. The next day, once firm, cut the roux into 1 oz cubes (if you divided the roux into ½-cup portions, you just need to divide these into fourths). This recipe yields about 16 oz total.

To make the curry:

  1. Add the water to a pot and bring to a gentle simmer.
  2. Add the curry roux cubes and stir until completely dissolved.
  3. Stir in the honey, soy sauce, and Worcestershire sauce. Taste and season with a little salt if needed.
  4. Add cooked diced chicken, potatoes, carrots, or other toppings. Simmer until everything is heated through and the vegetables are soft.
  5. Add a splash of water if needed to loosen the curry to your preferred consistency. Serve hot!

Notes

Frequently Asked Questions:

Can I use salted butter instead of unsalted?: Yes, but reduce the added salt in the roux and adjust seasoning when cooking the curry to avoid over-salting.

How long does the curry roux keep?: The roux will keep for 2 weeks in the refrigerator or up to 6 months in the freezer when stored in an airtight container.

Can I freeze the roux?: Yes – freezing works very well. Freeze the roux in pre-portioned cubes so you can use exactly what you need. Store up to 6 months.

Why does the butter and flour need to be 1:1?: A 1:1 ratio by weight creates a stable roux that melts smoothly and thickens the curry properly; changing the ratio can affect texture and consistency.

My curry is too thick – how do I fix it?: Simply add more water a little at a time while simmering until you reach your preferred consistency.

My curry tastes flat – what should I adjust first?: Start by adjusting Worcestershire sauce or soy sauce, then sweetness (honey or apple), and finally salt.

Is this meant to be healthier than boxed curry?: This recipe isn’t about making curry “healthy” – it’s about controlling ingredients and using butter instead of vegetable or canola oils.

  • Prep Time: 5 minutes
  • Cook Time: 20 minutes

Nutrition

  • Serving Size: 8