These Kinder Bueno cookies are thick, soft, and chewy chocolate chip cookies loaded with chopped Kinder Bueno bars and Kinder chocolate, then finished with a drizzle of Nutella.
Cream: In a large mixing bowl, beat the room temperature butter, brown sugar, granulated sugar, vanilla extract, and salt with an electric hand mixer for 2 to 3 minutes, until creamy and light in color.
Eggs: Add the eggs and egg yolk and mix until smooth and creamy.
Dry Ingredients: Add the flour and baking soda and mix until almost combined, with a few dry streaks remaining.
Fold: Add the chocolate chips, Kinder chocolate pieces, and chopped Kinder Bueno, and fold with a spatula just until combined.
Chill: Cover the bowl with plastic wrap and chill the dough for at least 1 hour, or overnight for the best results.
Bake the cookies
Scoop and Stuff: Preheat your oven to 180°C (350°F) and line a baking sheet with parchment paper. Scoop the dough into 1½ tablespoon balls, press a piece of Kinder chocolate into the center of each one, and wrap the dough around it to seal. Place them on the baking sheet, leaving space between each cookie.
Bake: Bake for 11 to 12 minutes, until the edges are golden and the centers still look slightly soft.
Top: Immediately press more chocolate chips and Kinder Bueno pieces into the tops of the warm cookies.
Cool: Let the cookies cool on the baking sheet for 5 minutes, then transfer them to a wire rack to cool completely.
Drizzle and Chill: Warm the Nutella in the microwave for 15 to 20 seconds until pourable. Transfer it to a piping bag or zip-top bag, snip a small corner, and drizzle it over the cooled cookies. Refrigerate for at least 1 hour so the Nutella sets.
Notes
Chill the Dough: Chill for at least 1 hour, or up to 2 days. Cold dough spreads less, so the cookies stay thick and chewy.
Room Temperature Ingredients: Use soft butter and room temperature eggs so the dough creams smoothly and bakes evenly.
Measure the Flour: Spoon and level the flour or weigh it. Too much flour makes the cookies cakey; too little makes them spread.
Chop the Kinder Bueno: Cut the bars into bean-sized pieces with a serrated knife so the wafer stays crispy.
Seal the Kinder Chocolate: Wrap the dough completely around each piece of Kinder chocolate. Chocolate left on the surface can scorch in the oven.
Pull Them Early: Take the cookies out when the edges are golden and the centers still look soft. They set as they cool.
Top While Warm: Press the extra Kinder Bueno and chocolate chips into the cookies right out of the oven so they stick.
Cookie Size: 1 tablespoon scoops bake in 9 to 10 minutes; 3 tablespoon scoops bake in 13 to 15 minutes.
Nutella Drizzle: Drizzle only once the cookies are completely cool, then refrigerate for at least 1 hour so it sets before stacking or storing.
Storage: Keep in an airtight container at room temperature for up to 4 days.
Freezing: Freeze dough balls for up to 3 months and bake from frozen, adding about 1 minute. Baked cookies freeze for up to 3 months.