Whisk together the milk, yogurt, oil, sugar, vanilla extract and vinegar in a large bowl.
120 g (½ cup) unsweetened non-dairy milk (I use soy), 160 g (⅔ cup) vegan Greek style yogurt, 110 g (½ cup) neutral oil (I use olive), 180 g (¾ cup + 2 Tablespoons) caster or granulated sugar, 1 Tablespoon vanilla extract, 2 teaspoons vinegar
Whisk in the baking powder, bicarbonate of soda and salt, followed by the flour. Be careful not to over-beat the batter, just mix it until no streaks of flour remain.
2 ½ teaspoons baking powder, ½ teaspoon bicarbonate of soda (baking soda), ¼ teaspoon salt, 300 g (2 ½ cups) plain (all-purpose) flour
Very gently fold in the raspberries and chocolate chips, try not to break up the raspberries.
170 g (1 ½ cups) raspberries, 150 g (scant 1 cup) vegan chocolate chips
Cover the bowl with a tea towel and let it rest for 15 minutes. Meanwhile, preheat the oven to 220°C/200°C fan/425°F/gas mark 7. Line two muffin tins with 8-9 cases, spreading them out across the tins so that there is a gap in between each one.
Divide the batter between the muffin cases, filling them all the way to the top. An ice cream scoop is handy for this.
Bake for seven minutes then turn the oven down to 180°C/160°C fan/350°F/gas mark 4. Bake for a further 22-25 minutes, until a skewer inserted into the centre comes out clean (avoiding any raspberries or chocolate).