To decorate a cake with a ribbon

Make a corolla batter.

Colour 1/4 batter with cocoa powder. Keep the rest plain.

Make a cone.

Fill the cone with chocolate corolla mixture.

Spread the plain batter using a brush in long strips on a slightly greased pastry sheet.

Make chocolate drawings (dots, lines, zigzags...)...

...on plain strips.

Bake in hot oven 180°C...

...until the strips brown.

Remove from the sheet using a triangular spatula and bend the cake to be used for ribbon.

Cut other strips crosswise...

...before pinching them when warm to form curls.

Gather them in a bouquet on the cake to form a ribbon.