Place the butter into a microwave safe proof bowl and blitz to melt, and set aside to cool
Place the flour, fructose, baking powder, bicarbonate of soda and salt into a bowl
Whisk to combine then set aside
Add the egg to the butter and whisk to slacken the egg
Add the buttermilk and the vanilla to this, and then whisk to combine
Pour this into the flour mixture and whisk until just combined
Set aside while you heat your waffle iron
Make the waffles as per the manufacturers instructions, making sure that when you pour the batter onto the waffle iron it does not quite reach the edges