Preheat the oven to 347°F (175 °C) and mix the butter, sugar, eggs and vanilla in a bowl. Mix well, preferably with a mixer. Combine the flour, cocoa and baking powder and add them to the butter and sugar.
Make a soft dough from the mixture. Shape the cookies using 2 teaspoons. Then arrange them on a flat tray, covered with baking paper.
Press the colorful bonbons to the cookies for decoration. Put them to bake on medium heat in the oven for 5-10 minutes.
Allow them to cool on a board or plate.