Step-by-Step Method
Step 1: Make the crust
In a large bowl, mix flour, sugar, and salt. Cut in the butter using a pastry cutter or your fingers until the mixture looks crumbly with pea-sized bits. Slowly add ice water, one tablespoon at a time, until the dough just comes together.
Divide the dough in half, shape each into a rectangle, wrap in plastic wrap, and chill for 30 minutes.
Step 2: Prepare the filling
In a large bowl, toss the sliced apples with both sugars, flour, cinnamon, nutmeg, lemon juice, and vanilla. Let it sit for about 10 minutes so the flavors can blend and the apples release a little juice.
Step 3: Roll out the dough
Preheat your oven to 400°F (200°C).
Roll one piece of dough into a rectangle large enough to cover the bottom and sides of a rimmed baking sheet (around 10x15 inches). Carefully transfer it to the pan and press it in gently.
Step 4: Assemble the pie
Spread the apple filling evenly over the crust. Roll out the second piece of dough and lay it over the apples. Trim any excess edges, then pinch or crimp to seal. Cut a few small slits on top to let steam escape. Brush with the beaten egg and sprinkle with coarse sugar for a golden sparkle.
Step 5: Bake it to perfection
Bake for 35–40 minutes, or until the crust is deeply golden and the filling is bubbling around the edges. Let it cool on a rack for at least 20 minutes before slicing — this helps the filling set beautifully.
Step 4: Closing
This Apple Slab Pie is the kind of dessert that brings everyone to the table — simple to make, easy to share, and impossible to resist. Whether it’s a family dinner, holiday feast, or potluck party, this pie delivers classic flavor and warm nostalgia in every bite. Serve it warm with a scoop of vanilla ice cream and watch it disappear!