Firstly, put two sprigs of rosemary into a pot with the butter. Slowly melt the butter till it is a light golden brown. Take off to cool, leaving the rosemary in till the last minute, then discard.
Put the sugar into a food processor with the picked rosemary leaves and process until you have a nice green sugar.
Melt the chocolate and set aside keeping warm
In a mixer, beat the eggs and sugar until light and fluffy. Mix in butter and chocolate with hazelnut flour ( or GF flour) and cocoa and combine well.
Pour into a brownie tin or bake in individual tins for approximately 15 minutes, or until just set. Test with a skewer. They can be under cooked for a fudgy effect