Oreo cupcake with silky mascarpone cream

Finely chop the walnuts (but do not grind them completely fine), then lightly toast them in a dry pan.

Place paper liners into 15 muffin tins, approximately 5 cm in diameter. Place one whole Oreo cookie at the bottom of each (15 pieces in total).

In a small saucepan, heat 180 ml of water with the butter until the butter melts. Add the cocoa powder and mix thoroughly.