1. Preheat the oven to 180°C (350°F). Line two baking sheets with baking parchment and set aside.

2. In a large bowl beat the butter on high speed until light in color. Add the peanut butter and two sugars and mix until all is well combined. Add the egg and vanilla extract and mix until well combined. Mix flour, baking powder and salt and add to the bowl – mix until just combined.

3. Shape little balls (approx. the amount of a tablespoon) and press them together to get flattened cookies, then place them on the prepared baking sheets. Use a fork to make a criss-cross pattern on the cookies. Bake the cookies for about 6-7 minutes – do not overbake or the cookies will get very dry. Take them out of the oven and let them cool down on the baking sheets for about 5 minutes – then transfer to a wire rack and let cool down completely. Decorate the cookies with melted chocolate to your liking (optional).