Pre-heat oven to 350F/180C. Grease and flour, spray or line an 8x8 inch square pan with parchment paper.
Whisk together the flour, sugar, salt and baking powder in a large bowl or food processor. Add the egg, vanilla and butter, pulse or mix with your hands until you have coarse crumbs.
Transfer half the mixture to the prepared pan, press down lightly to form the base.
Arrange the bars on top of the base (with no space between them), cover the bars with the remaining crumb mixture. Sprinkle the top with the chocolate chips and bake for approximately 30-35 minutes or until golden brown. Let cool in the pan on a wire rack, dust with powdered sugar, cut and serve. Enjoy!
Notes
How to store the Kinder chocolate cookie bars?
Keep the cooled bars in an airtight container at room temperature for up to 3 days. For longer storage, refrigerate them for up to 5 days.These bars freeze well. Once cooled, wrap them tightly in plastic wrap and place in a freezer-safe bag or container. Freeze for up to 2 months. Thaw at room temperature before serving.