Preheat oven to 215°C/420°F (conventional setting)
Line a 6 hole muffin tin with cupcake or muffin papers
In a large bowl, whisk together the butter and sugar until well combined
Add the egg and whisk again
Whisk in the buttermilk, yogurt and vanilla until everything has combined well
Take a spoonful of the flour and add it to a small bowl, tossing it through the raspberries and then set aside
Fold the remaining flour, as well as the baking powder, baking soda and salt into the wet mix until almost combined
Now fold through the floured berries and coconut until just combined
Use a large ice cream scoop to scoop heaped spoonfuls of mixture into the lined muffin pan
Sprinkle eash muffin with the raw sugar and extra coconut
Bake at 215°C for 5 minutes, then turn the oven down to 180° and continue to bake for another 15 minutes
When cooked, remove the pan from the oven and let the muffins rest in the pan for 2 minutes, before cooling on a rack (or just eat straight away!)