Cook's Illustrated on Instagram: "Thinking about splurging on prime rib this holiday? @chef.eric.explains has you covered. ⁠ Here’s the cheat sheet:⁠ Go for the first cut (ribs 10–12) — it’s the most tender and uniform.⁠ “Prime” grade = the richest marbling and the biggest flavor payoff.⁠ Planning portions? Figure about 1 pound per person.⁠"