Apple turnover murder / Joanne Fluke.

Enhanced descriptions from Syndetics:

It's June in Lake Eden, Minnesota, and for Hannah Swensen, that means bridal showers galore, plus a massive fundraising event in need of confections-not to mention a killer who never learned that charity begins at home... Early summer brings plenty of work for Hannah, even before Mayor Bascomb's wife drops by The Cookie Jar to place an order ...for eleven-hundred cookies! Stephanie Bascomb is organizing an elaborate three-day event to support local charities, and though it's a worthy cause, Hannah almost flips when her business partner, Lisa, suggests setting up an apple turnover stand. Hannah's never made a turnover-but, pushover that she is, she places her faith in Lisa's mother-in-law's recipe and agrees to be a magician's assistant in the fundraiser's talent show... Dozens of pastries and one hideous purple dress later, Hannah has to admit that stepping out of her comfort zone has been fun as well as profitable. The only snag is the show's host, community college professor Bradford Ramsey. Hannah and her younger sister Michelle each had unfortunate romantic relationships with Ramsey, and when the cad comes sniffing around between acts, Hannah tells him off. But when the curtain doesn't go up, she discovers Ramsey backstage-dead as a doornail with a turnover in his hand... Now, to protect her reputation and Michelle's, Hannah must get to the bottom of the professor's bitter end. There are plenty of scorned suspects, including an ex-wife who feels cheated in more ways than one, and a prominent local who may have been using Ramsey to avenge her own randy spouse. But who was unstable enough to snuff out Professor Love? A killer who's flakier than puff pastry-and far more dangerous...