Combine the first 8 ingredients (crab boil through Worcestershire sauce), add water until half full and boil for 30 minutes. Note: This can be done as a prep step earlier to blend seasonings, and you can bring it back up to a boil when you are ready to cook.
Add potatoes and sausage, and cook 5 minutes.
Add corn, and cook 5 minutes more.
Add in shrimp, and cook until shrimp start to turn pink, about 3 to 5 minutes. My medium peeled, deveined shrimp took about 3 minutes. Shell-on shrimp take about 5 minutes. (Cooking time may vary, based on size of shrimp, so be careful not to overcook.)
Strain and serve immediately. Tip: I like to have cocktail sauce, butter, salt and pepper available.
You can use this same recipe with shell-on shrimp. Just cook the shrimp until they turn pink (about 5 minutes).
If you decide to double this recipe, make sure to use a large stock pot, like this 4 gallon one (Amazon affiliate).
If the water gets low ass you are adding ingredients, and the food is not fully covered, add more water and return to a boil before adding the next ingredient.