Sweet Potato Pie Bars Recipe with Cinnamon Streusel

If you love traditional sweet potato pie, these bars are an easy, slice-and-serve twist. They capture the classic pie elements—smooth filling, warm spices, and a rich crust—but are served in convenient squares, perfect for gatherings or casual treats.

The Biscoff crust contributes a deep caramel note and crisp texture, while the pecan streusel adds crunch and sweetness. Roasting the sweet potatoes concentrates their flavor, yielding a rich, satisfying filling. These bars are ideal for fall celebrations, holiday tables, or a cozy afternoon with coffee.

Table of Contents

• Sweet Potato Pie Bars Ingredients
• Substitutions
• How to Make Sweet Potato Pie Bars
• Pro Tips for the Best Sweet Potato Pie Bars
• Storing Leftovers
• FAQ
• More Cozy Fall Recipes
• Sweet Potato Pie Bars Recipe

See the recipe card below for exact quantities and full details.

Crust Ingredients

• Biscoff cookies — provide caramelized, spiced flavor that complements the sweet potato filling.
• Butter — binds the crust and adds rich, buttery flavor.

Streusel

• All-purpose flour — creates the crumbly streusel texture.
• Brown sugar — adds sweetness and caramel notes.
• Butter — melted to bind the streusel into crumbs.
• Pecans — chopped, for crunch and a nutty finish.

Filling Ingredients

• Sweet potatoes — roasting enhances their natural sweetness; smaller tubers are often sweeter.
• Large eggs — provide structure and a smooth, creamy texture.
• Brown sugar and granulated sugar — balance and deepen the filling’s sweetness.
• Spices — cinnamon and nutmeg (or pumpkin pie spice) for warmth.
• Vanilla extract — adds depth and rounds flavors.
• Butter — for richness and a velvety mouthfeel.
• Heavy cream — yields a silky, smooth filling.

Substitutions

Crust: If Biscoff isn’t available, gingersnaps, vanilla wafers, or graham crackers make good alternatives. Gingersnaps add spice, vanilla wafers are sweeter, and graham crackers are a classic option.

Nuts: Swap pecans for walnuts or pumpkin seeds for a different texture and flavor profile.

Topping: For a sweeter variation, replace the streusel with a toasted marshmallow topping for a s’mores-like twist.

How to Make Sweet Potato Pie Bars

Step 1: Preheat oven to 425°F (220°C). Roast whole sweet potatoes on a baking sheet until fork-tender, about 30–40 minutes. Let cool slightly.

Step 2: While they roast, make the streusel: combine flour, brown sugar, chopped pecans, cinnamon, nutmeg, and a pinch of salt. Stir in melted butter until small clumps form. Chill the streusel in the refrigerator while you prepare the other components.

Step 3: Reduce oven temperature to 350°F (175°C). Line a 9×9 pan with parchment. Pulse Biscoff cookies in a food processor to fine crumbs, then mix with melted butter until the texture resembles wet sand. Press the mixture firmly into an even layer in the pan and bake the crust for about 12 minutes.

Step 4: Remove skins from roasted sweet potatoes and mash until smooth. Stir in brown sugar, granulated sugar, cinnamon, nutmeg, vanilla, melted butter, and heavy cream. Allow the mixture to cool until warm, then beat in the eggs until combined.

Step 5: Pour the sweet potato filling over the baked Biscoff crust, spreading evenly.

Step 6: Sprinkle the chilled streusel over the filling and bake for 30–35 minutes, until the streusel is golden and the filling is set. Cool to room temperature, then refrigerate for at least 3 hours to fully firm up. Serve chilled or slightly warmed with ice cream if desired.

Pro Tips for the Best Sweet Potato Pie Bars

• Roast the sweet potatoes for the best flavor — roasting caramelizes the sugars and deepens taste.
• Let the mashed sweet potatoes cool slightly before adding eggs to prevent scrambling.
• Press the crust firmly so it holds together when sliced; use the bottom of a mug or cup for even pressure.
• Chill the streusel before baking so it stays crumbly and crisp after baking.
• Refrigerate the bars until fully set before slicing for clean squares and easier serving.

Storing Leftovers

Store cooled bars in an airtight container in the refrigerator for up to 4 days. For longer storage, wrap bars individually and freeze in a freezer-safe bag or container for up to 2 months. Thaw in the refrigerator before serving.

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