1-Getting Started: First, heat your oven to 350 degrees Fahrenheit and get a 13×9-inch baking pan ready by lining it with foil that hangs over the edges for easy lifting later. Give it a good spray with cooking spray to prevent sticking. Now, mix the cake mix, 1/2 cup of melted butter, and 1 egg in a large bowl until it forms a soft dough, then press that evenly into your pan.

2-Getting Started: Sprinkle 1 cup of white chocolate chips over this base to add those melty surprises. In the same bowl after a quick clean beat the cream cheese until it’s nice and smooth. This step ensures your filling is creamy without any lumps, setting the stage for gooey Biscoff white chocolate bars perfection.

3-Mixing the Filling: Add 2/3 cup of smooth cookie butter spread to the cream cheese and beat it together until blended. Carefully mix in 3 eggs and another 1/2 cup of melted butter, then stir in the 16-ounce box of powdered sugar until the mixture thickens up. This creates the gooey layer that makes these bars so irresistible.

4-Mixing the Filling: Pour that filling right over your crust in the pan. Pop it in the oven and bake for 35 to 40 minutes, keeping an eye out until the center is almost set but still a bit jiggly that’s how you get that signature gooey texture in Biscoff white chocolate gooey bars.

5-Finishing Touches: Let the bars cool completely on a rack, then chill them in the fridge for at least 2 hours, or even overnight, before you cut them into bars. Dust with powdered sugar just before serving to add a sweet finish. The total time for this is about 3 hours and 10 minutes, including cooling and chilling, so plan ahead for the best results.