Here are the supplies you need.
Squeeze in lemon or vinegar
The lemon or vinegar helps take away the fishy smell and adds a small amount of flavor
Add crabs to the bottom of the pot (add as many as you want to cook)
Cover crabs with old bay. I like a lot but you can add as much as you like. You also can add no old bay
Cover the pot and bring the water to a boil over high heat. When boiling turn the temp down to medium. Steam crabs for 5-8 minutes. All you are doing is heating them up since crab is already cooked!
Add 3 tablespoons of butter to a microwave safe dish and cover with a paper towel. Cook for 30-60 seconds or until melted. Do not so this step until your crabs are ready.
Done! This was at about 5 minutes.
If your crab comes out like this you did not over cook it.
DO not over cook the crab. If you do it will stick to the shell and take longer to eat. Good luck!