Rectangle Apple Pie Recipe: Crustless Spice-Filled Squares for Easy Slicing

This rectangle apple pie recipe transforms traditional dessert into perfectly portioned squares—no crust, no mess, just tender spiced apples baked to golden perfection. 🍏 The secret lies in its rectangular shape, designed for easy slicing and serving, while a lattice topping keeps the filling juicy yet crisp.

I developed this version after years of perfecting pie crusts, only to realize the filling deserved all the attention without the fuss of rolling dough.

The filling combines sweet-tart apples with cinnamon, nutmeg, and a touch of brown sugar, baked until caramelized at the edges. A simple lattice crust made from store-bought dough strips adds visual appeal and prevents sogginess.

Baking at 375°F for 40 minutes ensures a tender center with just the right caramelized bite—no overcooking, no underbaking.

What sets this apart is the foolproof assembly: pre-sliced apples prevent a soggy bottom, while the rectangular pan guarantees clean, even cuts for serving. Top with a light powdered sugar glaze or leave it rustic—either way, each slice delivers that perfect balance of spiced apple and buttery crust.

This is the kind of dessert that disappears faster than you can say "second helping."

Perfect for potlucks, family dinners, or meal prep—just slice and serve. The rectangular shape makes it ideal for sharing, while the crustless design keeps prep simple. Let’s bake this pie the easy way.

Ingredients for rectangle apple pie

Eight ingredients, one foolproof dessert—no crust, no fuss, just perfect spiced apple squares.

The apples are everything here. Granny Smith and Honeycrisp give you that perfect sweet-tart balance—Granny Smith for tang, Honeycrisp for crispness. Trader Joe's has pre-sliced apples in the refrigerated section if you're short on time, but whole apples last weeks in the fridge. Slice them thin (about 1/4-inch) so they cook through without turning mushy. I always peel mine—no one likes apple skin in their pie. For a shortcut, Costco's pre-sliced apples work too, but they're pricier.

No brown sugar? White sugar plus 1 tsp molasses works just as well. Swapping apples? Braeburn or Fuji hold up fine, but avoid Red Delicious—they get mealy. The lattice topping is where magic happens. Pillsbury refrigerated crust is my go-to for convenience, but homemade tastes better. For the lattice, cut the sheet into 1-inch strips—use a pizza cutter for clean lines. The butter should be cold so the lattice stays crisp. Want extra flavor? Toss the sliced apples with 1 tsp lemon zest before baking.

This pie tastes even better the next day—honestly, it's the best part. Store leftovers in an airtight container for 4-5 days or freeze for 3 months. The lattice keeps it crisp, so no soggy bottoms. For meal prep, slice into squares and freeze on a tray before transferring to a bag. Reheat at 350°F for 10 minutes to warm through. The powdered sugar glaze is optional but makes it look fancy—just mix with a splash of milk if you want it drizzled.

Step-by-step instructions for crustless spice-filled apple squares

Here's how to turn simple ingredients into perfectly spiced, easy-to-slice apple squares.

In a large mixing bowl, combine the 4 medium Granny Smith Apples and 4 medium Honeycrisp Apples after peeling, coring, and slicing them thinly into ¼-inch slices. Toss them gently with the 2 tbsp Lemon Juice—this prevents browning and adds brightness to the filling.

In a separate small bowl, whisk together the 0.75 cup Light Brown Sugar, 2 tbsp Ground Cinnamon, 0.5 tsp Ground Nutmeg, 0.25 tsp Allspice, and 0.5 tsp Salt. Sprinkle this spice mixture evenly over the apples and toss until every slice is coated. Let the mixture sit for 10 minutes—this allows the flavors to meld and the apples to soften slightly.

Preheat your oven to 375°F and grease a 9x13-inch baking dish with nonstick spray. Spread the apple mixture evenly in the dish, pressing down lightly to create a compact base. This ensures even baking and prevents the apples from shifting during cooking.

Roll out the 1 sheet Store-Bought Pie Crust on a lightly floured surface until it's about 12x15 inches. Cut it diagonally into 6 strips (about 2-inch wide). Arrange 3 strips horizontally across the apple filling, spacing them ½-inch apart. Then, cut the remaining 3 strips diagonally into 3 strips each and layer them vertically, alternating directions to create a classic lattice pattern. Press the edges gently to seal.

Dot the lattice with 0.5 cup Unsalted Butter, cubed, and bake for 45-50 minutes until the apples are tender and the lattice is deep golden brown. You'll know it's done when the filling is bubbling and the crust edges are crisp and slightly caramelized.

Here's the thing—don't overbake. The apples should be soft enough to pierce easily with a fork, but still hold their shape. If the top isn't brown enough after 45 minutes, broil for 1-2 minutes on high, watching closely to avoid burning.

While the pie is still warm, whisk together the 0.25 cup Powdered Sugar, 0.5 tsp Vanilla Extract, and 1 tbsp Granulated Sugar with 1-2 tablespoons of water until smooth. Drizzle this glaze evenly over the hot filling and let it soak in for 5 minutes. The warmth will help the glaze melt into a glossy finish.

Let the apple squares cool completely in the pan for at least 1 hour before slicing. This resting period allows the filling to set and the flavors to develop fully. Once cooled, you'll get clean, easy-to-slice squares with a perfect balance of tender apples and crisp lattice.

Serving suggestions for this recipe

Serving Warm

Serve these apple squares warm straight from the oven for that perfect balance of tender apples and crisp lattice. The heat enhances the caramelized edges and makes the spiced filling even more aromatic.

I like to plate them on a wooden board with a dusting of powdered sugar—it adds a touch of elegance without overpowering the natural flavors. 🍏

With Ice Cream

Pair your rectangle apple pie with a scoop of vanilla bean ice cream or cold brew coffee ice cream for a delightful contrast. The cool creaminess balances the warm spiced apples beautifully.

For a fun twist, try salted caramel ice cream—the saltiness cuts through the sweetness of the pie. Serve with a drizzle of caramel sauce for extra indulgence.

As Dessert Topping

Turn these apple squares into a showstopper dessert by layering them over warm cinnamon rolls or pancakes. The lattice adds a crunchy texture that contrasts perfectly with the softness of the rolls or pancakes. Drizzle with maple syrup or honey** for a cozy breakfast or brunch treat. 🍯

Meal Prep Slices

For meal prep, slice the cooled pie into individual 2x2-inch squares and store them in an airtight container. These make perfect grab-and-go treats for school lunches, office snacks, or quick desserts.

Reheat in the microwave for 20-30 seconds to restore the crispness of the lattice. The rectangular shape makes them easy to pack and transport.

Garnish Ideas

Elevate your presentation with simple garnishes. A sprinkle of toasted pecans adds crunch and a nutty flavor, while fresh mint leaves bring a refreshing contrast. For a festive touch, add a few drops of food-grade vanilla extract to the powdered sugar glaze before dusting.

A pinch of flaky sea salt on top enhances the sweetness and adds a sophisticated finish.

Beverage Pairings

Complement your apple pie with warm beverages like chai tea or spiced apple cider to enhance the cinnamon and nutmeg flavors. For something cooler, a glass of sparkling rosé wine or iced green tea provides a refreshing contrast.

A shot of bourbon or apple brandy on the side adds a cozy, adult touch for special occasions.

Frequently asked questions