Science expert Dan Souza explains the science behind tempered chocolate.Make our DIY Candy Bars recipe: http://bit.ly/3gPEVJZLearn more about tempering: http://bit.ly/3Unc3XbBuy our winning baking sheet: https://cooks.io/2OTFRd8 Browse our latest recipes: https://cooks.io/3f0HdooABOUT US: Located in Bostons Seaport District in the historic Innovation and Design Building, America's Test Kitchen features 15,000 square feet of kitchen space including multiple photography and video studios. It is the home of Cooks Illustrated magazine and Cooks Country magazine and is the workday destination for more than 60 test cooks, editors, and cookware specialists. Our mission is to test recipes over and over again until we understand how and why they work and until we arrive at the best version.If you like us, follow us:http://americastestkitchen.comhttp://facebook.com/americastestkitchenhttp://twitter.com/testkitchenhttp://instagram.com/testkitchenhttp://pinterest.com/testkitchen