Testing for doneness when baking poses specific challenges, as any fan of "The Great British Baking Show" can attest. The outside of a cake or pie might be perfect, while the inside might come out ...

When testing to see if cakes are done, toothpicks are the go-to tool. For the classic cake toothpick test, you simply insert a wooden toothpick near the center of the cake. If the toothpick comes out ...