Preheat the oven to 190ºC

Line the muffin tin with paper cases

Lift the Chef Patissier XL head and fit the head shield

Fit the Roto food cutter to the machine

Fit the Drum No 2 to the Roto food cutter

Place a medium mixing bowl underneath the attachment

Add dark chocolate into the Roto food cutter

Using the pusher, gently push the chocolate down the feed tube

Remove the attachment from the machine

Set the grated chocolate aside

Attach the EasyWarm bowl to the machine

Add butter into the EasyWarm bowl, fit the splash guard

Cook at heat setting 9 for 5 minutes

Fit the Whisk tool to the machine

Add milk, eggs, vanilla extract into the EasyWarm bowl

Mix on speed 4 for 30 seconds

Remove the EasyWarm bowl and the Whisk tool

Fit the K beater to the machine

Attach the Mixer bowl to the machine

Add flour, baking powder, caster sugar, salt into the Mixer bowl

Mix on speed 1 for 20 seconds

Transfer the content of the EasyWarm bowl into the Mixer bowl

Mix on speed 4 for 10 seconds

Scrape down the sides of the bowl with a spatula

Add blueberries into the Mixer bowl

Transfer the grated chocolate into the Mixer bowl

Mix on speed 2 for 10-20 seconds until just combined

Divide the mixture evenly between the muffin cases

Bake at 190ºC for 20 minutes until light golden brown

Remove from the oven and let cool

Serve