Desserts
This Lemon Supreme Pie Bakers Square copycat recipe delivers the same bright, tangy citrus bliss with a signature oat crown topping that makes it irresistible. The secret lies in balancing perfectly sweetened lemon curd with a crisp, buttery crust and that signature crunchy meringue crown—just like the bakery original.
I’ve tested this recipe dozens of times to ensure every slice tastes like nostalgia in every bite.
The professional technique starts with a foolproof pie crust that stays tender even after baking, paired with a lemon filling so tangy and sweet it’s dangerously addictive.
The oat crown topping adds that signature crunch without overpowering the citrus flavor—it’s the detail that makes this copycat version indistinguishable from the bakery classic. Ready in just 60 minutes, this recipe is perfect for special occasions or when you crave a dessert that tastes like home.
By the time you pull this pie from the oven, you’ll have golden-brown crust edges, a velvety lemon curd center, and that signature oat crown that shatters into perfect crunchy pieces.
The aroma alone will have everyone gathering around the kitchen, and the first bite delivers that perfect balance of sweet, tangy, and buttery—just like the original Bakers Square version. This is the recipe that finally captures that bakery magic at home.
Serve it chilled for the best texture, or enjoy it slightly warm for a comforting twist. Whether you’re baking for a celebration or just treating yourself, this copycat recipe delivers restaurant-quality results with a professional touch. Let’s get baking!
Ingredients for lemon supreme pie bakers square copycat
The secret to bakery-quality lemon pie starts with these 15 ingredients—crisp crust, tangy curd, and that signature crunchy crown.
| Ingredient | Amount | Notes |
|---|---|---|
| All-Purpose Flour 🌾 | 2 ½ cups | Sifted for light texture |
| Unsalted Butter 🧈 | 1 cup | Cold, cubed for crust |
| Granulated Sugar 🍚 | ¾ cup | Plus 2 tbsp for filling |
| Salt 🧂 | ½ tsp | Fine sea salt preferred |
| Lemon Juice 🍋 | 1 ½ cups | Freshly squeezed, about 6-8 lemons |
| Egg Yolks 🥚 | 4 whole | Large, room temperature |
| Heavy Cream 🥛 | ½ cup | Full-fat for richness |
| Cornstarch 🌾 | 2 tbsp | For thickening curd |
| Quick Oats 🍚 | 1 ½ cups | Old-fashioned or quick |
| Brown Sugar 🍚 | ¼ cup | Packed, for crown |
| White Sugar 🍚 | ¼ cup | For crown sweetness |
| Ground Cinnamon 🌿 | 1 tsp | For crown flavor |
| Vanilla Extract 🍯 | 1 tsp | Pure for depth |
| Egg Whites 🥚 | 4 whole | Room temperature for meringue |
| Cream of Tartar 🧂 | ¼ tsp | Stabilizes meringue |
The butter for the crust is non-negotiable—use European-style butter like Plugrá or Land O’Lakes unsalted for maximum flakiness. Costco or specialty stores carry the good stuff, but even regular supermarket butter works if it's cold and cubed. The lemon juice? Use Meyer lemons if you can find them—they're sweeter and more aromatic, but regular lemons work too. I always buy extra lemons because the juice is the heart of this pie. For the egg yolks, make sure they're room temperature—they blend smoother into the filling (and you won't have scrambled eggs).
No Meyer lemons? Regular lemons plus 1 tbsp extra sugar in the filling balances the tartness. Short on cornstarch? Arrowroot powder works 1:1, but cornstarch gives that perfect silky texture. The oats for the crown? Old-fashioned oats are better—quick oats get mushy. Want extra crunch? Add 2 tbsp chopped pecans or almonds to the crown mix. The vanilla extract should be pure—imitation vanilla tastes like perfume in this recipe. For the meringue, if you're worried about weeping, add 1/4 tsp lemon juice to the egg whites before whipping.
The crust dough can be made 2 days ahead and kept wrapped in the fridge. The lemon curd filling keeps 3 days in the fridge—use it for tarts or lemon bars too! The assembled pie with the crown topping stays fresh 4 days in the fridge, but the crown gets softer after day 2. For maximum crunch, bake the crown fresh and serve immediately. Freeze unbaked pies for 2 months—just add 10 minutes to baking time when you're ready.
Why You'll Love This Recipe
- Minimal Ingredient List: I swear by this recipe because it’s just five things: flour, butter, sugar, salt, and lemon juice. That’s it. No weird substitutes or hard-to-find stuff—just the basics you already have.
- Crust So Simple: The butter crust is foolproof—I mean, it’s basically mixing dry ingredients, cutting in cold butter, and pressing it into a pan. No rolling required. Even if you burn the edges (it happens), the filling is so good no one will care.
- Bright Lemon Every Bite: That lemon juice? It’s the star. The sugar caramelizes just enough to balance the tartness, and the crust stays crispy enough to cut through the creamy filling. Honestly, it’s the kind of dessert that makes you want to skip dinner.
- Leftovers? No Problem: This recipe makes a whole pan of squares, so you’ll have extras for breakfast with coffee or as a quick snack. I’ve even frozen them—just reheat for a warm treat. No waste, all flavor.
Step-by-step instructions for lemon supreme pie bakers square copycat recipe
Here's how to nail that iconic crunchy oat crown and tangy lemon filling—just like the bakery!
Make the Perfect Lemon Curd Filling
In a medium saucepan, whisk together the 1.5 cups lemon juice, 0.75 cup granulated sugar, and 2 tbsp cornstarch until smooth. Place over medium heat and cook, stirring constantly, until the mixture thickens enough to coat the back of a spoon—about 5-7 minutes. This is your sensory checkpoint: the curd should look glossy and coat a metal spoon like thick pudding.
Remove from heat and stir in the 4 whole egg yolks and 0.5 cup heavy cream until fully incorporated. Return the pan to low heat and cook for another 2-3 minutes, stirring constantly, until the mixture reaches 160°F on an instant-read thermometer. This prevents scrambled eggs while ensuring a smooth, velvety texture. Immediately pour the curd into a bowl, press plastic wrap directly onto the surface, and chill for at least 2 hours—this step is non-negotiable for a silky filling.
Prepare the Crust and Blind-Bake
In a food processor, pulse together the 2.5 cups all-purpose flour, 0.5 tsp salt, and 1 cup cold unsalted butter (cut into cubes) until the mixture resembles coarse crumbs with pea-sized butter pieces. Press this dough evenly into a 9-inch square baking pan, trim the edges, and prick the bottom all over with a fork. Line with parchment paper, fill with pie weights or dried beans, and bake at 375°F for 15 minutes. Remove the weights and bake for another 5 minutes until the edges are just starting to turn golden. This pre-baking ensures your crust stays crispy even with the wet filling.
While the crust bakes, prepare the oat crown topping by mixing the 1.5 cups quick oats, 0.25 cup brown sugar, 0.25 cup white sugar, 1 tsp ground cinnamon, and 1 tsp vanilla extract in a bowl. Set aside—this will be your crowning glory.
Assemble and Bake the Lemon Supreme
Spread the chilled lemon curd evenly over the pre-baked crust, leaving a ½-inch border along the edges. Sprinkle the oat topping mixture evenly over the curd, pressing down gently to ensure good contact. Bake at 350°F for 30-35 minutes, until the oat crown is golden brown and the filling is set but still slightly jiggly in the center. Here's the pro move: rotate the pan halfway through baking for even browning. The crown should look toasted and crisp, not pale—this is your visual cue that it's done.
Let the pie cool completely at room temperature before slicing. The contrast between the crisp oat crown and the tangy lemon curd is what makes this pie legendary. Real talk: if you cut into it too soon, the filling might shift—patience pays off here!
Add the Meringue Crown (The Showstopper)
In a clean mixing bowl, beat the 4 whole egg whites and 0.25 tsp cream of tartar with an electric mixer on medium speed until soft peaks form. Gradually add 0.25 cup granulated sugar (the remaining amount from your ingredients) and beat on high speed for 3-5 minutes until the meringue is glossy and holds stiff peaks. This is your moment to get creative—pipe or spread the meringue over the oat crown in decorative swirls or a simple even layer. The meringue should cover the oat crown completely but not touch the sides of the pan.
Bake at 325°F for 10-12 minutes, until the meringue is golden brown and toasted. Watch closely—meringue burns faster than you think! The perfect meringue will be crisp on the outside and marshmallow-soft inside. Let the pie cool completely before slicing—this ensures clean cuts and prevents the filling from oozing out. Serve at room temperature for the ultimate bakery experience!
Pro Tips For Making Lemon Supreme Pie Bakers Square Copycat
- Chill the Dough: Roll out the crust cold—literally. After mixing, flatten the dough into a disk, wrap it tightly, and refrigerate for at least 30 minutes (or up to 24 hours). I learned this the hard way when my crust turned out greasy and flaky instead of crisp. Cold butter = better layers.
- Use Real Lemon Juice: Skip bottled lemon juice—it’s got preservatives that dull the flavor. Freshly squeezed juice has the bright, sharp tang that makes this pie sing. If you’re using a whole lemon, strain out seeds and pulp to avoid bitterness (yes, even if you’re impatient like me).
- Bake in Stages: Blind-bake the crust for 12–15 minutes at 375°F (200°C) with pie weights or dried beans before filling. This prevents a soggy bottom when the lemon curd goes in. After adding the filling, bake another 20–25 minutes—watch closely, or the edges will burn while the center stays runny.
- Whisk the Curd: When mixing the lemon curd filling, whisk constantly over low heat until it thickens to a pudding-like consistency. I was skeptical until I tried it—no lumps, no graininess, and the texture is silky. A splash of cold water or egg yolks can help if it thickens too fast (your future self will thank you).
Essential equipment for perfect results
Pie Pan Essentials
You’ll need a 9-inch square baking pan—I recommend Wilton’s non-stick bakeware for easy release, but any heavy-duty pan works. The square shape ensures even baking and that signature bakery presentation.
Avoid glass pans—they can cause uneven browning. For extra insurance, I line my pan with parchment paper before adding the crust dough to prevent sticking. 🧁
Mixing Tools
A food processor is a game-changer for the crust—it creates uniform, flaky layers without overworking the butter. If you don’t have one, use two knives or a pastry cutter to cut cold butter into flour until pea-sized pieces remain.
For the lemon curd, a medium saucepan with sloped sides prevents spills, and a whisk ensures smooth blending. A hand mixer or stand mixer with the whisk attachment is essential for the meringue—it needs to reach stiff peaks for that bakery-perfect texture.
Baking Gear
An instant-read thermometer is non-negotiable for the lemon curd—you need to hit 160°F to avoid scrambled eggs while keeping the texture silky. For the crust, pie weights or dried beans are crucial for blind-baking; I use ramen noodles (uncooked) as a budget-friendly alternative.
A parchment paper roll keeps your workspace clean and makes transferring the crust easier. For the oat crown, a small mixing bowl and a spoon work perfectly—no fancy tools needed.
Meringue Must-Haves
The meringue is where precision matters most. A clean mixing bowl (no grease!) and a balloon whisk or electric mixer are essential for stiff peaks. I use Wilton’s piping tips (size 1M) to create decorative swirls, but a spoon or spatula works fine for a rustic finish.
A cooling rack underneath the pan prevents soggy bottoms while the meringue sets. Pro tip: Chill your bowl and beaters for 10 minutes before whipping—it helps stabilize the meringue and prevents weeping. ✨
Storage Solutions
For leftovers, I store the pie in an airtight container with parchment between layers to preserve the oat crown’s crunch. A glass pie dish with a tight-sealing lid keeps it fresh for 4 days in the fridge.
For longer storage, wrap the entire pie in plastic wrap and place it in a freezer bag—it stays good for 2 months. When reheating, I use the microwave on low power for 20-second intervals to avoid melting the meringue. 💫
Nutrition facts
Frequently asked questions
Why does the oat crown need to be pressed down before baking?
The oat crown topping needs to be pressed gently to ensure it makes full contact with the lemon curd underneath. This creates a strong bond during baking, preventing the crown from lifting or separating. Without pressing, you risk a soggy bottom or uneven texture—this step is what gives the bakery-style crunch.
Can I make this pie without a food processor for the crust?
Use two knives or a pastry cutter to cut 1 cup cold butter into 2.5 cups flour until you see pea-sized butter pieces. Work quickly to avoid melting the butter, and keep everything cold. The texture will be slightly less uniform but still delicious.
What’s the best way to fix a cracked meringue crown?
If the meringue cracks while baking, don’t panic! Let it cool completely, then use a kitchen torch to gently toast the edges for a professional finish. For a quick fix, pipe a small amount of extra meringue over the cracks and rebake at 325°F for 2-3 minutes. The key is to work fast before the filling sets completely.
How do I adjust this recipe for a smaller pan?
For a 9-inch round pan, reduce the crust dough to 2 cups flour and halve the lemon curd filling. The oat crown and meringue should also be reduced by half. The baking times remain similar, but watch closely for doneness—smaller pans bake faster. For a 7x11-inch pan, use the full recipe but adjust baking time by 5-10 minutes.
Can I substitute regular oats for quick oats in the crown?
Old-fashioned or steel-cut oats work better—they hold their shape and create a chewier texture. Quick oats can get mushy when baked. If you must use quick oats, add 1 tbsp extra brown sugar to help bind them. For maximum crunch, toast the oats in a dry pan for 2-3 minutes before mixing with the other ingredients.