Shrimp-Crab Gumbo - cooking recipe

Ingredients

1 1/2 c. vegetable oil
2 c. all-purpose flour

Preparation

In a large heavy Dutch oven or cast iron skillet over medium heat stir together the flour and oil, and cook, whisking constantly, until flour is a rich copper color (about 20 minutes--don't leave it or stop whisking for a second!).
Remove from heat immediately so it won't burn and proceed with gumbo recipe below.