Apple pie in sundae form! Tart Granny Smith apples cooked with brown sugar and cinnamon and dowsed in caramel sauce. Served over vanilla ice cream in a flaky homemade (easy!) buttermilk pie crust shell.
Allow chilled pie crust to sit at room temperature for 5 minutes to soften slightly.
On a well-floured surface, roll out pie crust to 3/8-inch thick. Cut 5 4-inch rounds using a biscuit cutter or large cup, balling and re-rolling the dough once if necessary*. If your dough is becoming warm and your rounds stick to your cutting board, use a metal spatula to carefully dislodge them.
Flip your muffin pan upside down and drape dough over alternating cups. Gently squeeze dough down so that it is loosely molded over the top of the cups (it doesn't have to be perfect, just vaguely cup-shaped).
Refrigerate for 15 minutes to firm up slightly. Brush with egg wash, being careful not to drip egg onto the pan as it can cause the cups to stick.
Bake for 15 to 18 minutes, until golden. Remove from oven and allow to cool for 10 minutes before gently removing cups. If they have stuck to the egg wash, carefully use a spatula to loosen them first.
Topping
While cups bake, in a small pot, over medium heat, combine apple pieces, brown sugar, butter, and cinnamon. Cook, stirring occasionally until apples reach your desired consistency, about 4 to 6 minutes. (If making your own caramel sauce, prepare it while apples soften.)
Remove from heat and stir in warm caramel sauce.
Assemble
Place pie cups on plates and fill with a scoop of vanilla ice cream each. Spoon caramel and apple sauce over the top and enjoy!
Notes
*If you need to re-roll your dough, make sure that there are no seams or folds in it as the layers can separate when baking and leave holes in your cups.