Milk Bar Pie Squares – A Sweet, Gooey Delight with an Oatmeal Cookie Crust and Rich, Creamy Filling

If you’re a fan of indulgent desserts that bring together contrasting textures and flavors, these Milk Bar Pie Squares are calling your name. Featuring a soft, chewy oatmeal cookie crust and a luscious, buttery filling, these squares are the ultimate combination of rich sweetness and irresistible crunch. Easy to make and even easier to eat, these squares are perfect for any occasion—whether you’re hosting a gathering or just in need of a sweet treat to satisfy your cravings. You might want to make extra because they’re bound to disappear quickly!

Scroll to the bottom for recipe!

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The Inspiration Behind Milk Bar Pie Squares

Inspired by the famous Milk Bar Pie, these squares provide a more shareable, easy-to-serve take on the beloved dessert. With an oatmeal cookie base instead of the traditional crust, these pie squares offer a delightful chewy texture that pairs perfectly with the creamy, rich filling. Whether you’re serving these at a party or enjoying them as a personal treat, these squares bring a new level of indulgence that’s sure to impress anyone who takes a bite.

Why Milk Bar Pie Squares Will Become Your Go-To Dessert

These squares deliver everything you love about dessert: a gooey, buttery filling, a chewy oatmeal cookie crust, and a powdered sugar topping that adds just the right amount of sweetness. The recipe is incredibly easy to follow, making it perfect for both experienced bakers and those new to the kitchen. Plus, they’re versatile—delicious on their own or paired with a scoop of vanilla ice cream, a drizzle of caramel, or even fresh berries.

Nutritional Information (Per Serving, Based on 12 Servings):

• Calories: 450 kcal
• Fat: 25g
• Carbohydrates: 45g
• Protein: 6g
• Sugar: 30g

These squares are sweet, rich, and satisfying on their own but can also be enhanced with a few additional treats to take them to the next level.

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Serving Suggestions and Pairings

Serve these Milk Bar Pie Squares with a hot cup of coffee or a tall glass of cold milk for the ultimate indulgent treat. For a more elevated dessert experience, add a scoop of vanilla ice cream on top, or drizzle with caramel or chocolate sauce. These squares also pair wonderfully with fresh fruit like strawberries or raspberries, which add a refreshing contrast to the rich filling.

Storage and Make-Ahead Tips

For best results, refrigerate these squares for at least 4 hours or overnight to allow the filling to set completely. Store any leftovers in an airtight container in the refrigerator for up to 5 days. If you’re planning ahead, you can make the oatmeal cookie crust and filling the day before and store them in the refrigerator. Just sprinkle with powdered sugar before serving to add a finishing touch.

Cooking Tips

• Chill for the Best Texture: Be sure to refrigerate the bars after baking to allow the filling to fully set. The texture is much better when served chilled.
• Don’t Overbake: The filling should still have a slight jiggle when it comes out of the oven. It will continue to set as it cools, so don’t worry if it looks a little wobbly at first.
• Add Some Flair: If you want to make these bars extra special, try adding a drizzle of caramel or chocolate sauce on top before serving. You can also add a pinch of sea salt for a delicious contrast to the sweetness.

Optional Variations

• Nutty Twist: Add a handful of chopped nuts, such as pecans or walnuts, to the oatmeal cookie crust for an extra crunch.
• Chocolate Lovers: Stir in some chocolate chips or drizzle melted chocolate over the bars for a more decadent version.
• Fruity Flair: Add a layer of fresh fruit, such as raspberries or strawberries, between the crust and filling for a fresh, fruity twist.

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Milk Bar Pie Squares Recipe

Ingredients:

For the Crust:

• 1 stick (½ cup) softened butter
• 1 tablespoon water
• 1 egg
• 1 (17.5 oz) box of oatmeal cookie mix

For the Filling:

• ¾ cup granulated sugar
• ½ cup brown sugar
• 2 tablespoons nonfat milk powder
• ¼ teaspoon salt
• ½ cup softened butter
• ⅓ cup heavy cream
• 1 teaspoon vanilla extract
• 4 egg yolks
• 2 tablespoons cornstarch

Instructions:

1. Prepare the Cookie Mix: Preheat your oven to 350°F (175°C). In a medium bowl, stir together 1 stick of softened butter, 1 tablespoon of water, and 1 egg with the oatmeal cookie mix until a stiff dough forms.
2. Bake the Oatmeal Cookie Crust: Press the oatmeal cookie dough evenly into a greased 9x13” baking dish. Bake for 25-30 minutes, or until fully baked. Remove from the oven and allow the crust to cool completely.
3. Make the Crust: Once the oatmeal cookie has cooled, crumble it into small pieces. Add 2 cups of the crumbled cookies to a food processor along with 3 tablespoons of softened butter and 1½ tablespoons of brown sugar. Process until the mixture forms a fine crumble. Press the crumb mixture evenly into the bottom of a greased 8x8” baking dish to form the crust.
4. Prepare the Filling: In a large bowl, whisk together ¾ cup granulated sugar, ½ cup brown sugar, 2 tablespoons nonfat milk powder, ¼ teaspoon salt, ½ cup softened butter, ⅓ cup heavy cream, 1 teaspoon vanilla extract, 4 egg yolks, and 2 tablespoons cornstarch until smooth and well combined.
5. Assemble the Bars: Pour the filling mixture over the prepared oatmeal cookie crust, making sure it is evenly spread.
6. Bake: Bake the bars at 350°F for 30 minutes. Then, reduce the oven temperature to 325°F and bake for an additional 20 minutes, or until the edges are set and the center is slightly jiggly.
7. Cool and Chill: Remove the bars from the oven and allow them to cool to room temperature. Once cooled, refrigerate for at least 4 hours or overnight to allow the filling to set completely.
8. Serve: Before serving, sprinkle the bars with powdered sugar for an extra touch of sweetness. Cut into squares and enjoy!

Milk Bar Pie Squares are the perfect balance of sweet, creamy, and chewy. The oatmeal cookie crust brings a nostalgic, comforting flavor, while the rich filling makes these squares absolutely irresistible. Whether you're sharing them with family and friends or indulging all on your own, these pie squares are sure to satisfy your dessert cravings. Enjoy every gooey, delicious bite!