Biscoff Cookie Butter Streusel Bars

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Cookie butter is all the rage right now, and for good reason – it’s so good! In this classic bar recipe, I’ve swapped peanut butter for cookie butter. These Biscoff Cookie Butter Streusel Bars are so good! They’re moist, flavorful, and not too sweet. They’re perfect in a lunchbox or with an afternoon cup of coffee. Made in an 8×8-inch pan, they make just enough for sharing!

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I love a bite of something sweet – but not too sweet – after dinner or in the afternoon. Sometimes a gal just needs a bit of a pick-me-up in the afternoon! These Biscoff Cookie Butter Streusel Bars do the trick. They’re sweet, but not too sweet, moist, and loaded with cookie butter flavor.

I love the topping on these bars. It’s buttery, crumbly, and delish! You can really jazz up this dessert with a dollop of whipped cream or a scoop of vanilla ice cream, but honestly, they’re so good just the way they are!

Ingredients:

• Butter – Salted butter, melted.
• Egg – Room-temperature eggs blend more evenly and help bind the streusel and base.
• Dark brown sugar – Light brown sugar works, but dark adds a deeper molasses flavor.
• Vanilla extract – I bake almost exclusively with artificial vanilla extract; but use what you’re comfortable with.
• Cinnamon – Ground cinnamon only. A little goes a long way in streusel.
• Biscoff cookie butter – You could also use Speculoos spread, but it tastes a bit different. You can find it near the peanut butter. Don’t substitute with peanut butter—it tastes completely different.
• All-purpose flour

For the topping:

• Butter – Salted butter, softened,
• Old fashioned rolled oats – Not quick oats or instant oats.
• Brown sugar
• Sugar
• All-purpose flour
• Cinnamon
• Biscoff cookie butter – Reserved for the drizzle.

How To Make Biscoff Cookie Butter Streusel Bars

Scroll down for the full recipe card with exact measurements and printable instructions.

Preheat the oven to 350°F and lightly spray an 8×8-inch baking pan with nonstick cooking spray. Line the pan with parchment paper, leaving a little overhang on the sides so the bars are easy to lift out after baking.

Whisk the melted and cooled butter, egg, dark brown sugar, vanilla extract, cinnamon, and Biscoff cookie butter together in a large bowl until smooth and well combined. The mixture should look glossy and evenly blended.

Gradually stir in the flour just until incorporated, taking care not to overmix. Overworking the batter can make the bars dense instead of soft and tender.

Spread the batter evenly into the prepared baking pan, smoothing the top with a spatula so it bakes evenly.

In a separate bowl, combine the softened butter, oats, brown sugar, granulated sugar, all-purpose flour, and cinnamon. Use your fingers to work the mixture together until it becomes crumbly and forms small clusters.

Sprinkle the streusel evenly over the batter, then bake for about 30 minutes, or until a toothpick inserted into the center comes out mostly clean with just a few moist crumbs.

Let the bars cool in the pan for about 20 minutes, then melt the reserved cookie butter in a small microwave-safe dish until smooth. Transfer the melted cookie butter to a zipper-top bag with one corner snipped off and drizzle it over the top of the bars.

Allow the bars to cool completely, then lift them out using the parchment paper, cut into squares, and enjoy.

Chef Jenn’s Tips

• For extra crunch, try adding chopped nuts such as pecans or almonds to the streusel topping.
• Don’t skip the step of greasing the baking pan, as it will make it easier to remove the bars once they’re baked.
• Allow the bars to cool completely in the pan before slicing to ensure clean cuts. For perfect cuts, partially freeze the bars before cutting.

Serving Suggestions

These Biscoff Cookie Butter Streusel Bars are perfect for dessert or as a sweet snack any time of day. Pair them with a scoop of vanilla ice cream for an indulgent treat, or enjoy them alongside a cup of coffee or tea for a cozy afternoon pick-me-up.

Storage

Store any leftover bars in an airtight container at room temperature for up to 3 days. If you want to keep them fresh for longer, you can also freeze them for up to 1 month. Simply wrap individual bars tightly in plastic wrap and then place them in a freezer-safe bag or container. To thaw, let them sit at room temperature for about 30 minutes before enjoying.