Start by preheating the oven to 220℃, line a muffins/cupcake tray with paper cases or just use square sheets of baking paper and push them into the cavity of the tray. We need the cases to be larger in size to ensure it holds the batter while baking.
In a large bowl add the sugar and lemon zest. Rub together until the sugar smells like lemons, around 1-2 minutes.
Add the eggs, milk, melted butter, vanilla and whisk until combined.
Add the flour, baking powder, baking soda, salt, castor sugar, raspberries, lemon juice and using a rubber spatula stir together until combined. Do not over mix.
Scoop 1/2 cup worth of batter into the lined muffin tray, alternating each mould, this helps them rise while baking. If you don’t have a large enough tray, bake the batter in batches.
Sprinkle the top with granulated sugar. Bake for 5 minutes at 220℃, turn the oven down to 180℃ and bake for 20 mins until a tooth pick inserted into the center comes out clean.
Remove from the tray and let them cool on a wire rack.