1. Add the soft butter and both sugars to a large bowl and mix on high until light and fluffy. Add the eggs one after another and mix well after each addition. Next, add the vanilla extract and mix. Combine flour, baking powder and salt, add it to the bowl and mix until just combined. Finally, add the müsli/granola and fold it in. The dough will be quite sticky, but that is fine. Cover with plastic wrap and place in the fridge for about 30 minutes.

2. Preheat the oven to 180°C (350°F). Line three baking sheets with baking parchment and set them aside. Place small portions of dough (about 1 1/2 tablespoons per cookie) on the baking sheets with enough space inbetween. Bake the cookies for about 12-15 minutes. The edges should have browned lightly, but the centers should still be a bit soft. Take them out of the oven and let them cool down on the baking sheets for 5 minutes and then let them cool down completely on a wire rack.