Preheat the oven at 175ºC / 350ºF and prepare a baking sheet with baking paper.
In a bowl, sift together flour, baking powder, baking soda, and salt.
125 g all-purpose flour, ½ teaspoon baking powder, ½ teaspoon baking soda, ½ teaspoon salt
In another bowl add peanut butter, butter, brown sugar and granulated sugar. Using an electric hand mixer, mix it together for 2 min, so it becomes light and fluffy.
80 g butter, 100 g peanut butter, 50 g granulated sugar, 150 g brown sugar
Add the egg and vanilla extract and mix it in.
1 large egg, 1 teaspoon vanilla extract
Add the flour mixture and with a spatula, fold it together until just combined. Then add the chocolate chips and fold them in.
100 g chocolate chips
Lastly add the Nutella on top of the cookie dough and with a butter knife, swirl it into the cookie dough.
100 g Nutella
Using a 2 tbsp/ 1.35 ounce cookie scoop, scoop out 6 cookies at a time per baking sheet. Bake one baking tray at a time for 10 min.
Once baked, decorate the cookies with dollops of Nutella and chocolate chips. Let them cool down on the baking tray for 5-10 min as they still will be soft when they are done. After they have cooled down a bit, use a spatula to lift them onto a cooling rack.