Here’s the simple math that won’t require a calculator: 12 to 18 minutes total for most blue crabs or Dungeness. Why the range? Because crabs are like snowflakes—except snowflakes don’t pinch you. A good rule is 10 minutes per pound for the first pound, then 5 extra minutes for each additional pound.
But wait! If you’re steaming a massive 3-pound king crab leg, you’re looking at 8 to 12 minutes. Why less? Because legs are skinny and steam penetrates faster—like gossip in a small town. For a whole, 2-pound snow crab, aim for 15 minutes. You’re not baking a cake; you’re persuading a sea bug to give up its soul.
When to Stop: The Color & Aroma Check
Here’s the part where you become a seafood detective. A fully cooked crab is bright red—like a fire truck that just won a chili cook-off. If it’s still mottled brown or green, it’s auditioning for a zombie movie. Don’t serve zombie crab. The smell should be sweet and briny, not fishy. If it smells like low tide on a bad day, toss it. That’s not a crab; that’s a science experiment.
But here’s the pro tip: pull a leg off. If the meat slides out clean and opaque white, you’re golden. If it’s translucent and wiggles like a nervous jello, steam it for three more minutes. And if the leg snaps back and attacks you, you may have a mutant—run.
