If you try to hurry the roux, or if you don't constantly stir, then you're going to end up with a bad roux. I know I have illustrations somewhere showing what rouxs look like at every step of the way-- a complete illustrative guide even showing overcooked and burnt rouxs. Of course, now that I need it I can't find it. If you start getting black specks, you've burned it, and just throw it down the disposal and start again. If it looks like it's breaking up and separating, then it's bad too. Did find this illustration. http://www.jonsullivan.com/recipes/shrimp_gumbo.php3 Look down in the recipe and you'll see a picture of a nice copper colored roux that I prefer (color of old penny). IMO, the Hershey's chocolate-colored roux is way too dark, and tastes bitter even when it's done correctly. Use cast iron skillet. Equal amounts of fat and flour. Heat oil first (peanut works great -- IMO rouxs cooked long enough for gumbo are too much for butter to take -- in fact many Cajun recipes call for margarine just for the fact it stands the heat better than butter). Add flour in little bits at first until all incorporated using whisk. After all is incorporated, use a flat-bottomed wooden spatula, and just keep stirring and stirring. Don't answer the phone. Don't go to the bathroom. Stir. For about 1 cup flour and 1 cup fat, it will probably take 45 minutes to 1 hour. BTW, in a pinch, a lot of Louisiana cooks use Savoy's roux in a jar. Their light roux is the perfect color, and I'm sure you could order it in a pinch until you have the roux mastered. And if you chicken-out and stop the roux before it's dark enough, like I've done so many times, Kitchen Bouquet seasoning darkens it up quite nicely. Hope this helps. P.S. Not a chef -- just a cook, so I'm sure not offering this as prof. advice.