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What’s your go to roux oil to flour ratio?

Posted on 1/25/26 at 5:36 pm
Posted by tigerinthebueche
Member since Oct 2010
37908 posts
Posted on 1/25/26 at 5:36 pm
3/4 cup oil to 1 cup flour but the roux seems thin. What is your go to? I cooked my roux on low for 90 minutes. Color was gorgeous but I’m not sure about the consistency.
Posted by Btrtigerfan
Disgruntled employee
Member since Dec 2007
23744 posts
Posted on 1/25/26 at 5:43 pm to
quote:

the roux seems thin...I cooked my roux on low for 90 minutes. Color was gorgeous but I’m not sure about the consistency.


The darker the roux, the less thickening effect. You need to use more if using a dark roux. Your ratio is perfect.
Posted by moe1967
South Louisiana
Member since Jul 2023
349 posts
Posted on 1/25/26 at 6:07 pm to
ALWAYS have oil and flour on hand to add to the roux as needed. I've never made a roux without adding one or the other. to achieve the consistency I like. Also, have a chopped onion ready when you are finished to stop the cooking process.
Posted by Riseupfromtherubble
You'll Never Walk Alone
Member since Jun 2011
39768 posts
Posted on 1/25/26 at 6:18 pm to
I’m probably just shy of 1.5 to 1. I start at about 1.25 to 1 and it’s by feel from there, have the flour and oil ready to go
Posted by RichJ
The Land of the CoonAss
Member since Nov 2016
5367 posts
Posted on 1/25/26 at 7:06 pm to
1:1 oil to flour, was how I was taught by my grandma…
Posted by tigerinthebueche
Member since Oct 2010
37908 posts
Posted on 1/25/26 at 7:32 pm to
quote:

ALWAYS have oil and flour on hand to add to the roux as needed. I've never made a roux without adding one or the other. to achieve the consistency I like


So no harm adding either
During the cooking process?

quote:

Also, have a chopped onion ready when you are finished to stop the cooking process.


Good to know. Thanks. Was curious if there was a way to do this.

Thanks everyone for the input.
Posted by yellowfin
Coastal Bar
Member since May 2006
98844 posts
Posted on 1/25/26 at 7:34 pm to
I never measure but if I had to guess 2.5:1 flour to oil
Posted by PlaySomeHonk
Montegut La and Liberty MS
Member since Jan 2023
617 posts
Posted on 1/26/26 at 2:00 am to
Some may say this is heresy, but I make a roux with whole wheat flour in a cast iron skillet with no oil. The oil adds no flavor and whatever I’m making the roux for always has plenty of fat. The whole wheat has the germ in it and it contains oil, and it gets a toasted aroma and taste that’s unique and very good. It doesn’t get as dark as a roux with oil, but when it’s added to the Trinity, meat, or liquid, it darkens nicely. Handed down from my mother.
Posted by moe1967
South Louisiana
Member since Jul 2023
349 posts
Posted on 1/26/26 at 5:18 am to
quote:

So no harm adding either
During the cooking process?


Not at all.

When you get to the color roux that you desire, I like the color of a Hershey Chocolate bar, turn burner off and move pot over to a cool area of stove. Dump in chopped onion and keep stirring for another 10 minutes or so. The roux will then get really, REALLY dark. Almost black. It is not burnt.

Pro Tip:
Wear long sleeves when doing this. Because if that shite splashes on your arm you are going to know about it. They don't call it "Cajun Napalm" for nothing. Ask me how I know! LOL
Posted by CHEDBALLZ
South Central LA
Member since Dec 2009
23186 posts
Posted on 1/26/26 at 6:15 am to
Depends

If I'm going to cook my vegetables down in the roux then I'll do 1:1, I want more fat to help coat the vegetables to help them cook down (fry a little)
If I'm making a lot of roux to save for when I'm in a hurry. I use 1.5:1 flour to fat.
Posted by Jon A thon
Member since May 2019
2467 posts
Posted on 1/26/26 at 7:49 am to
This is dumb, but I've never once measured. I was taught in a particular cast iron pot and when I got married, received a very similar sized cast iron pot. I know how much oil to put in to get a layer on the bottom and I sprinkle in flour until I get the right consistency. Drag a wooden spoon and see a bit of a trail before it fills back in.

I have trouble scaling down and just end up freezing a ton of it when just cooking for our 4-person family.
Posted by ragincajun03
Member since Nov 2007
28419 posts
Posted on 1/26/26 at 8:35 am to
I start with a 1 to 1 ratio, then keep adding flour as it cooks down and darkens.
Posted by Novastar
Member since Jan 2023
749 posts
Posted on 1/26/26 at 9:10 am to
Flour to oil ratio. 45 min tops

Seafood gumbo - 1:1

Chicken sausage gumbo - 1.5:1
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