Ingredients
Method
- 1. Prepare the Cake Pans: Preheat oven to 350°F (175°C). Line four 7-inch or three 8-inch pans with parchment rounds and grease well.
- 2. Make the Cake Batter: In a large bowl, mix flour, sugars, baking powder, cinnamon, and salt. Add butter and mix on low until crumbly. Add egg whites, then buttermilk, oil, and vanilla. Mix until smooth, scraping the bowl as needed.
- 3. Bake the Layers: Divide batter evenly among pans and bake 33–35 minutes, or until a toothpick comes out with a few crumbs. Cool for 10 minutes, then remove from pans and chill layers in the freezer for 30 minutes before frosting.
- 4. Make the Vanilla Buttercream: Beat butter until smooth. Mix in vanilla and salt, then gradually add powdered sugar, alternating with cream until fluffy. Adjust consistency as needed.
- 5. Make the Cookie Butter Frosting: In a separate bowl, combine 2 cups of vanilla frosting with cookie butter and heavy cream until smooth.
- 6. Assemble the Cake: Layer cake, spreading vanilla frosting, then cookie butter frosting, and drizzling warm cookie butter between layers. Repeat with remaining layers.
- 7. Frost and Decorate: Apply a crumb coat, chill, then frost the cake fully. Press chopped Biscoff cookies around the sides, pipe a decorative border on top, and finish with a drizzle of warm cookie butter.
Notes
For best flavor, let the finished cake rest in the fridge for a few hours before serving. The flavors develop beautifully overnight! If desired, drizzle melted cookie butter just before serving for an extra decadent finish.
