Traditional Roux Recipe (Light or "Blonde" Roux)

Light Roux
Chris Everard Photography/Photolibrary/Getty Images
  • 40 mins
  • Prep: 10 mins,
  • Cook: 30 mins
  • Yield: About 1 Cup (1 serving)
Ratings (6)

As a small child, I would stand at the stove, watching my grandparents stir together the simple ingredients of flour and fat. It seemed to take forever, but just as I was ready to vacate my position, the toasted bread aroma would emerge, bringing with it a nutty brown color. I knew that a fantasy of flavors was about to emerge as they began to add ingredients to this unattractive brown paste.

Roux is an essential part of Cajun cooking: it thickens a sauce, soup or stew and deepens its flavor.  

This is the quickest way to make roux, but needs more attention than oven or microwave roux.  

What You'll Need

  • 3/4 cup vegetable oil *
  • 1 cup all-purpose flour

How to Make It

*For a thinner roux and, thus, a thinner sauce use 1 cup of oil and 1 cup of flour. I use more flour than fat as I like a thicker gravy. The more oil you use, the less chance there is of burning the roux, so you may want to start out with equal parts of fat and flour.

Traditional Roux

Heat a cast iron skillet or pot over medium heat for about 2 minutes. 

Add oil and heat for another 2 minutes. Add flour and whisk or stir constantly to combine to a smooth consistency.

Continue to whisk or stir constantly until roux reaches ​the desired color, 8 to 60 minutes (8 minutes for the blonde roux in the photo).

See the following links for more about making traditional, microwave, and oven roux: Oven Roux Recipe, Microwave Roux Recipe, The Holy Trinity of Cajun Cooking.

Many details follow the instructions below. Don't let these alarm you — making a roux is simple, I've just given you many variables to be aware of.

If the roux seems to be cooking very fast or getting very dark, turn the heat down. Above all, stir almost constantly--at least every 15 seconds; with each stir the roux gets just a bit darker. I like to use a flat metal spatula (like a pancake turner) as it covers more surface area than a spoon.

When the roux reaches the desired color, you may proceed with a recipe, adding the holy trinity of onion, celery, and bell pepper, and whatever main ingredient you are using, plus seasonings and water.

Make Ahead Roux

If you are making the roux ahead to keep as needed, transfer it to a large glass or plastic bowl to stop the cooking process, stirring occasionally as it cools down. Roux can be kept in the refrigerator for two months, or in the freezer for six months.

If freezing the roux, place 1 tablespoon of the roux in each section of an ice cube tray and, when firm, transfer to a freezer bag. When a recipe calls for 1/2 cup roux, pop out 8 cubes (8 tablespoons, or 1/2 cup). You may also use a cube or two at a time if your stew, soup or sauce needs a bit of thickening.


3 cups oil + 3 cups flour = 3 2/3 cups roux

1 cup oil + 1 cup flour = 1 cup plus 3 tablespoons roux

If a recipe calls for making a roux with 1/2 cup oil and 1/2 cup flour, use 1/2 cup of prepared roux, or a quantity of prepared roux equivalent to the amount of flour called for in the recipe.

To thicken 6 to 8 cups of liquid for a gumbo, soup or ​another dish, use 1 cup prepared roux, or start with 1 cup flour and 1 cup fat.

What to Look for When Cooking Roux

After a few minutes, the roux is likely to become foamy and remain so for several minutes. After about 10 minutes the roux will begin to turn dark and will develop a nutlike fragrance. After about 20 minutes the roux will start to cook faster and must be watched more carefully so it doesn't burn. Lower the heat if necessary--a burned roux is only fit for the garbage.

If the roux starts to smoke, lower the heat or turn the heat off for a bit to allow the roux to cool down. If the oil gets hotter than the point at which it starts smoking, it may negatively affect the taste.

    Rouxmor (or Roux Humor)

    As they do with almost every aspect of their lives, Cajuns have many jokes about cooking--there are two that go along with nearly every discussion of roux. The question is posed: "How long does it take to make a roux?" And the answer if one of two:

    1. The amount of time it takes to drink a six-pack of beer, or

    2. The amount of time it takes to brew and drink a pot of coffee.

    I'd like to share an interview with Chef Kevin Belton of New Orleans School of Cooking, that was in the cookbook, Soul and Spice, by Heidi Cusick-Dickerson.

    Kevin "has fond memories of his mother making roux." He recalls:

    "My mama made her roux at a high temperature so it didn't take as long. But she couldn't leave it, no matter if the doorbell rang or anything. That meant I had a good fifteen minutes to jump on the bed and she couldn't catch me because she was making the roux. I learned to judge the time by the aroma coming from that roux. Just as it begins to brown, the flour has a nutty fragrance that means it's almost done. I could smell it changing and I knew when to get off the bed.

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    Nutritional Guidelines (per serving)
    Calories 1867
    Total Fat 179 g
    Saturated Fat 14 g
    Unsaturated Fat 126 g
    Cholesterol 0 mg
    Sodium 1,410 mg
    Carbohydrates 63 g
    Dietary Fiber 7 g
    Protein 8 g
    (The nutrition information on our recipes is calculated using an ingredient database and should be considered an estimate. Individual results may vary.)