Mix flour with baking powder and salt and stir in.
Finally, fold in the chopped walnut kernels.
Divide the dough evenly on small plates and heat at 175 ° C top and bottom heat or 150 ° C circulating air for about 20 minutes Bake the middle rack.
Allow to cool for 5 minutes in the mold, then place on a wire rack and allow to cool completely.
In the meantime, for the frosting, cream the cream cheese with the soft butter and stir in the maple syrup. Gradually add the icing sugar to the desired consistency. Frosting on the cupcakes squirt. Drizzle with maple syrup and decorate with walnut kernels.