Fill Masterbuilt Fryer to the MAX fill line with water. Set to 375°F and bring to a boil. Add salt and crab boil. This will take approximately 15 to 20 minutes. Although cooking time on this recipe is short, water may need to be added if steamer is used for more than 60 minutes.
Add the crab legs to basket. Using the drain clip, hook basket onto the inner pot. (Note: Do not lower basket into water when steaming.) As the water starts to boil again, begin timing. Steam the crab legs for 15 to 20 minutes, until you begin to smell their aroma. Make sure not to overcook the legs. Remove from the heat and serve hot with melted butter and lemon wedges.