Every now and then, I crave a dessert that feels extra sweet but comforting. That’s exactly how this Homemade Biscoff Cake Slice came to be. I had a jar of Biscoff spread in the pantry that kept calling my name, and instead of dipping into it with a spoon (okay… I may have still done that), I decided to create a soft, buttery cake layered with creamy Biscoff frosting and topped with cookie crumbs. The result? A slice that tastes like a bakery treat but is surprisingly simple to make at home!

⭐ Why You’ll Love This Homemade Biscoff Cake Slice Recipe

• Soft, moist vanilla–Biscoff cake that’s incredibly flavorful
• Dreamy Biscoff buttercream that melts in your mouth
• Perfectly sweet without being overwhelming
• Looks bakery-made yet easy enough for beginners
• Ideal for parties, coffee dates, or dessert bars

📋 Recipe Overview

• Servings: 9–12 cake slices
• Prep Time: 20 minutes
• Bake Time: 25–30 minutes
• Total Time: ~50 minutes
• Estimated Calories: ~380 per slice (varies by frosting amount)

🍰 Ingredients

For the Cake

• 1 ½ cups all-purpose flour
• 1 cup granulated sugar
• 1 ½ tsp baking powder
• ½ tsp salt
• ½ cup unsalted butter, softened
• 2 large eggs
• ½ cup milk
• ⅓ cup Biscoff spread (melted slightly)
• 1 tsp vanilla extract

For the Biscoff Frosting

• ½ cup unsalted butter, softened
• ½ cup Biscoff spread
• 2 cups powdered sugar
• 2–3 tbsp heavy cream or milk
• Pinch of salt
• Optional: extra Biscoff cookies for topping

🥣 How to Make Homemade Biscoff Cake Slice

1. Preheat

• Preheat oven to 350°F (175°C).
• Line an 8×8 or 9×9 pan with parchment paper.

2. Whisk the Dry Ingredients

In a bowl, combine:

• Flour
• Sugar
• Baking powder
• Salt

3. Mix the Wet Ingredients

In a separate bowl, mix:

• Eggs
• Melted Biscoff
• Milk
• Vanilla
• Butter

4. Combine

• Pour wet mixture into dry ingredients.
• Mix just until smooth but don’t overmix.

5. Bake

• Spread batter into the prepared pan.
• Bake 25–30 minutes, or until a toothpick comes out clean.
• Cool completely before frosting.

🎂 Make the Biscoff Frosting

1. Beat butter until fluffy.
2. Add Biscoff spread and mix well.
3. Add powdered sugar gradually.
4. Add cream/milk until smooth and spreadable.
5. Spread frosting over cooled cake.
6. Top with Biscoff crumbs or drizzle melted Biscoff.

💡 Tips & Tricks for the best Homemade Biscoff Cake Slice

• Warm the Biscoff spread for easier measuring and smoother mixing.
• Use room-temperature butter and eggs for a fluffier cake.
• Chill the cake before slicing for perfect clean cuts.
• Add extra Biscoff drizzle for a bakery-style look.
• Double the recipe for a 9×13 party-sized sheet cake.

🔄 Variations & Substitutions

Variations

• Biscoff Layer Cake: Double the recipe and stack with extra frosting.
• Chocolate Biscoff Cake: Add ¼ cup cocoa powder to the dry ingredients.
• Swirl Cake: Swirl melted Biscoff into the batter before baking.
• Cookie Crunch: Add crushed Biscoff cookies into the frosting layer.

Substitutions

• Butter → Vegan butter for a dairy-free version.
• Milk → Almond or oat milk works perfectly.
• Powdered sugar → Coconut powdered sugar for a less refined option.
• Biscoff → Any cookie butter if Biscoff isn’t available.

More Cake Recipes

• Tiramisu Yule Log Cake 
• Vegan Lemon Blueberry Pound Cake
• Strawberry Lemonade Cake
• Lemon Velvet Cake