Preheat the oven to 220°C fan/240°C conventional. Line a 12-hole muffin tray with cupcake/muffin cases.
In a large bowl, stir the flour, sugar and baking powder together to combine. Make a well in the middle and set aside.
300 grams Self-raising flour, 200 grams Golden caster sugar, 1 teaspoon Baking powder
In a separate bowl, whisk the oil, eggs, buttermilk and vanilla extract together.
80 grams Vegetable oil, 2 medium Eggs, 250 millilitres Buttermilk , 2 teaspoons Vanilla extract
Pour the wet ingredients into the dry. Fold until the mixture is just combined. Take care not to overmix, a lumpy mixture with lots of air bubbles is what you're looking for.
Add a heaped tablespoon of plain mixture into each muffin liner to create a sturdy base (this will stop the raspberries from sinking).
Toss the raspberries (reserve a handful for later) in a tablespoon of flour until well coated. Gently fold the raspberries and white chocolate chunks into the mixture.
150 grams Raspberries
Divide the mixture evenly between the liners, filling each one to the top.
Dot a few extra raspberries on top and sprinkle over a little demerara or granulated sugar (the kind you'd put in your tea!). This way you're guaranteed to see juicy berries peeking out of the tops and the sugar will add a little sweet crunch.
Pop the muffins in the oven on the middle shelf. Bake for 8 minutes at 220°C fan, then with the oven door closed, reduce the temperature to 180°C fan and bake for a further 12 minutes. Your muffins should look golden brown, have risen tall and domed on top.
Let the baked muffins sit in the tin for 5 minutes, then lift them out onto a wire rack and leave to cool for another 30 minutes. Muffins are best enjoyed warm and freshly baked, but they will keep for 1-2 days at room temperature in a baking tin. Or up to 4 days if stored in the fridge.