Historical clue formulations

• Layered Austrian pastry — 2017-11-06
• Apple product, perhaps — 2014-01-12
• Cobbler alternative — 2008-11-22
• Baked dessert — 2004-02-08
• Fruit-filled pastry — 2003-10-02
• German pastry — 2000-01-31
• Pastry whose name means "whirlpool" — 1996-04-24