Proof is in the... filling. If you’ve ever picked up a box of Bisquick, you’ve likely seen one of its “impossibly easy” recipes printed on the box—dishes ranging from sweet pies to savory casseroles.

“I’ve never had pie before,” Times Leader taste tester and reporter Hannah Simerson said when offered a slice of this week’s test kitchen recipe. Impossible, you think? Well, that would be appropriate ...