In this video, you’ll see how to make a lemon and caper butter sauce. This is a classic French sauce that’s perfect with seafood. The trick is in the technique. You’ll add a little cold butter at the end, slowly, seamlessly, blending it into the lemon juice. It’s a technique that gives you a sauce with amazing body and viscosity. Watch the video, then get the recipe for Chef John’s Lemon Caper Butter Sauce. Spoon it over pan-seared sole—it’s delicious with pretty much any fish. Try it with chicken, too.