Readers of Sylvia Plath’s diaries and letters will find her whipping up homemade mayonnaise, baking Toll House-style chocolate chip cookies, searing steak, and stewing rabbit. Rarely, though, did the famed poet and writer share her recipes. But this week, 33 of Plath’s typed and hand-annotated recipe cards surfaced at a London auction, sold together with her embossed wooden rolling pin. Plath fans pounced, bidding them up to $27,500. If the well-thumbed cards are any indication, Plath’s staples included delicacies such as chicken fricassee, cherry & cottage-cheese cobbler, and broiled Cape…