Overview: Julia and Bridget uncover the secrets to the best Coffee Cake with Pecan-Cinnamon Streusel. Tasting expert Jack Bishop challenges Julia to a tasting of crunchy peanut butter. Gadget critic Lisa McManus gives a roundup of smart gadgets for home cooks, and test cook Keith Dresser makes Bridget a foolproof Broccoli and Feta Frittata.