In a large Dutch Oven make a dark roux, using the oil and the flour, over low-medium heat. Stirring often to ensure it doesn't stick.
¾ Cup Vegetable Oil, 1 Cup All Purpose Flour
After the roux has become chocolate brown add the diced onions, bell peppers and celery and stir to combine. Turn up the heat a little to medium and continue to cook the vegetables for about 10 minutes until softened.
2 Each Yellow Onions, 1 Each Green Bell Pepper, 2 Ribs Celery
Add the garlic and cook another 2 minutes.
4 Cloves Garlic
Slowly pour in the crawfish stock and the water. Stir well and turn up the heat to medium-high.
3 Cups Crawfish Stock, 3 Cups Water
Add the seasonings, stirring, until a rolling boil has come around. Then turn the temperature down to low-medium and cover.
Allow to simmer for 1 hour, stirring occasionally.
After the 1 hour is up, add the peeled crawfish tails and stir. Turn off the heat.
2 Pounds Crawfish Tails
Allow to sit for 5 minutes then serve over white rice.
Notes
Whenever we have a crawfish boil, and we have leftover crawfish, we like to reserve some of the peelings to make a stock with - as we know we'll be making a crawfish etouffee or a stew like this one and using a nice crawfish stock really adds to the flavor!Add more seasoning as you see fit. This recipe will give you a little kick - depending on how spiced you have your crawfish. We like ours to have a good kick. That will transfer into the stew. If you're using frozen store-bought crawfish tails, then you'll probably have to add more seasoning. Taste as you go.