This Flat Apple Pie has a flaky cookie-sheet crust, cinnamon-sweet Granny Smith apples, and a thin vanilla frosting drizzled over the hot pie. It slices easily into crowd-friendly squares and gives you all the cozy flavor of an old-fashioned fried apple pie without the frying.
Cover leftover pie loosely and keep it at room temperature for 1 day, or refrigerate it for up to 3 days. To reheat, warm a square in a 300°F oven for 8 to 10 minutes to perk the crust back up, or microwave for about 20 seconds for a softer crust. Cold squares are also delicious.
Keyword apple pie, cinnamon apple dessert, cookie sheet pie, Flat Apple Pie, frosted apple pie, Granny Smith apples