Did you know baking powder can go bad? Before it ruins your next bake, Eric shares a quick and easy test to check if yours is still at full potency. Subscribe to America's Test Kitchen: youtube.com/@AmericasTestKitchen?sub_confirmation=1 ​ Watch full episodes of America's Test Kitchen and Cook's Country for free on our new YouTube channel: youtube.com/@ATKFullEpisodes Watch More! ​ In The Test Kitchen: youtube.com/watch?v=eLxup9tEP0M&list=PLnbzopdwFrnZsva37L040wy1u2RTOhqiF&pp=0gcJCWMEOCosWNin ​ The Taste Test: youtube.com/watch?v=SkqhwZqnA8s&list=PLnbzopdwFrnZ3usQguuxS2qWxlwj-9aN8 ​ Techniquely With Lan Lam: youtube.com/playlist?list=PLnbzopdwFrnYyvwrqTB_5AhufdOMisGnF ​ Most Popular: youtube.com/watch?v=2guC4Badq2s&list=PLnbzopdwFrnZcFFuiSDnaymlMCb9ANwC5 Follow America's Test Kitchen: ​ Instagram: instagram.com/testkitchen ​ Pinterest: pinterest.com/testkitchen ​ TikTok: tiktok.com/@testkitchen?lang=en ​ Fac...