Introduction

Lemon poppy seed bars are a bright and buttery treat with a zesty lemon curd center and a delicate crumbly topping. Perfect for a sunny afternoon snack or a fresh twist on classic bars, these are sure to brighten your day with every bite.

The image shows square slices of a dessert bar with three visible layers: a base layer that is light brown and crumbly, a middle layer of bright yellow, glossy filling that looks smooth and soft, and a top layer made of crumbly dough with black poppy seeds sprinkled throughout, giving a textured look. The edges of the bars are golden brown, indicating they are baked, with some slight caramelization around the filling. The bars are placed on a white plate resting on a white marbled surface. Photo taken with an iphone --ar 4:5 --v 7

Ingredients

1 cup (228 grams) unsalted butter, at room temperature, plus more for the pan
2/3 cup (130 grams) granulated sugar

3/4 teaspoon fine sea salt
Finely grated zest of 2 lemons

2 teaspoons pure vanilla extract (or ¼ teaspoon almond extract)
2 1/4 cups (270 grams) all-purpose flour

2 tablespoons poppy seeds
1 cup (240 grams) lemon curd, homemade or store-bought

Instructions

Step 1: Preheat the oven to 350°F (175°C). Butter an 8-inch square metal baking pan and line the bottom and sides with parchment paper, leaving about 1 inch of overhang on all sides for easy removal.

Step 2: In the bowl of a stand mixer fitted with the paddle attachment, combine sugar, salt, and lemon zest. Mix on medium speed until the sugar feels moist and fragrant, about 1 minute.
Step 3: Add the butter to the mixture and beat on medium speed until smooth and creamy, about 1 to 3 minutes. Mix in the vanilla or almond extract.
Step 4: Turn off the mixer, add the flour, then mix on low speed just until combined, about 1 minute. Add poppy seeds and continue mixing on low until evenly incorporated but the dough remains crumbly, about 1 more minute. Avoid overmixing.

Step 5: Transfer about 1 cup of the crumbly dough to a small bowl and set aside. Press the remaining dough evenly into the prepared baking pan using the bottom of a glass or your hands to form the crust layer. Spread the lemon curd evenly over the crust, then crumble the reserved dough over the top.
Step 6: Bake for 40 to 48 minutes, rotating the pan halfway through, until the topping is golden brown and the lemon curd is bubbly around the edges.
Step 7: Remove from the oven and let cool completely in the pan on a wire rack, about 1½ hours. Use the parchment overhang to lift the bars out of the pan. Trim off the parchment edges and cut into 16 squares before serving.

Tips & Variations

For extra tang, add a tablespoon of fresh lemon juice to the crumb dough before baking.
Swap almond extract for vanilla for a subtle nutty flavor, or omit extracts for a pure lemon taste.
If you enjoy a crunchier top, sprinkle some turbinado sugar over the crumb topping before baking.

Make your own lemon curd for a fresher and less sweet alternative to store-bought.

Storage

Store lemon poppy seed bars in an airtight container at room temperature for up to 3 days. For longer storage, keep them refrigerated for up to one week or freeze for up to 3 months. Thaw frozen bars at room temperature, and if desired, warm slightly in the oven before serving to refresh the crumbly texture.

How to Serve

The image shows several square slices of a dessert bar on a white plate, placed on a white marbled surface. Each slice has three visible layers: a firm brown crust at the bottom, a thick bright yellow middle layer that looks glossy and smooth, and a crumbly top layer speckled with small black seeds, giving it a textured and uneven appearance. The edges of the dessert bars are slightly golden brown, showing they are baked well, and there are some crumbs around the slices adding to a fresh look. Photo taken with an iphone --ar 4:5 --v 7

Serve this delicious recipe with your favorite sides.

FAQs

Can I make these bars gluten-free?

Yes, you can substitute the all-purpose flour with a gluten-free flour blend that measures cup-for-cup. Just ensure it contains xanthan gum or another binder to hold the dough together well.

Can I prepare these bars ahead of time?

Absolutely! These bars are great when made a day ahead as the flavors meld nicely. Just keep them covered at room temperature or refrigerated, and bring to room temperature before serving.