Creating Biscoff Cookie Bars is a simple process. Just follow these steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease a 9×9-inch baking pan or line it with parchment paper.
2. Mix Cookie Butter and Sugars: In a large mixing bowl, combine the Biscoff cookie butter, brown sugar, and granulated sugar. Mix until smooth.
3. Add Eggs and Vanilla: Beat in the eggs, one at a time, and then add the vanilla extract. Mix until well combined.
4. Combine Dry Ingredients: In another bowl, whisk together the flour, baking powder, and salt.
5. Combine Mixtures: Gradually add the dry ingredients to the wet ingredients, stirring until just combined.
6. Add Toppings: Fold in the crushed Biscoff cookies and chocolate chips if desired.
7. Pour into Pan: Pour the batter into the prepared baking pan and spread it evenly.
8. Bake: Bake in the preheated oven for 25-30 minutes or until a toothpick inserted in the center comes out clean.
9. Cool: Remove from the oven and allow the bars to cool in the pan for about 15-20 minutes. Then, transfer to a wire rack to cool completely.
10. Cut into Squares: Once cool, cut into squares and serve.

By following these simple steps, you will create delicious Biscoff Cookie Bars that everyone will love!