In a small saucepan over medium heat, combine diced apples, brown sugar, granulated sugar, cinnamon, butter, and lemon juice. Stir in cornstarch and cook until the mixture thickens, about 6–8 minutes. Remove from heat and cool.
Cut & Prep the Dough
Roll out your pie crust on a lightly floured surface. Cut into eight 3×6-inch rectangles. Keep extra pieces covered so they don’t dry out.
Assemble the Pies
Place ~2 Tbsp of cooled apple filling on each rectangle, leaving a ¼-inch border.
Brush the edges with beaten egg.
Top with a second rectangle, press edges together, and crimp with a fork.
Use a knife to cut 2–3 small vents in each pie.
Air-Fry or Bake
Air Fryer: Preheat to 360 °F. Brush pies with egg wash, sprinkle with cinnamon-sugar, and lightly spray with oil. Air fry in batches for 8–10 minutes, until golden and crisp.
Oven: Preheat to 400 °F. Place pies on a parchment-lined baking sheet, brush with egg wash, dust with cinnamon-sugar, and bake 18–22 minutes until golden.