Whisk butter, sugar, syrup and 1 pinch of salt until creamy. Mix flour, oat flakes, grated coconut and baking powder. Knead into the sugar-butter mixture with the dough hooks of the mixer.
Form approx. 20 balls (5 cm Ø) with a tablespoon. Put them on a tray and put them in the freezer for about 1 1⁄2 hours.
Preheat oven (electric cooker: 200 °C/circulating air: 175 °C/gas: see manufacturer). Line baking tray with baking paper. Place 10 balls on the baking tray with a large distance between them (as the balls will melt). Bake in a hot oven for approx. 15 minutes.
Take out and let it cool down on a cake rack. Bake the remaining cookies in the same way.