Heat the butter in a large pot over medium heat. Add the flour and cook, constantly stirring for about 30 minutes, until the roux has a chocolate-ish color.
Pour the chicken stock over the roux and stir until it thickens.Slice the Andouille sausage and cut the chicken breast into large chunks. Cook the sausage slices and the chicken on a pan at medium heat until brown.
Chop the onion, green bell peppers, garlic cloves, and celery in julienne. Then sauteé on a pan until the garlic is golden, add the chopped tomato and cajun spice.
Cut the okra into thick slices and sauteé on a pan with butter until brown. Then, add white vinegar and simmer a bit.
Now put everything together. Add the sauteed veggies, meats, and okra to the base. Then season with Worcestershire sauce, mix well and cover the pot with its lid. Let it cook on low heat for 30 minutes. Add the shrimp, mix well, and cook until they're pink, about 15 minutes. Before serving, remember to add Tabasco to the gumbo for a final touch.
Traditionally, gumbo goes along a serving of white rice. So, serve and enjoy your hearty, comforting gumbo!