Whisk together the lemon zest and juice, milk, yogurt, oil, sugar and vanilla extract in a large bowl.
finely grated zest of 3 lemons, 80 g (⅓ cup) fresh lemon juice, 160 g (⅔ cup) unsweetened non-dairy milk (I use soy), 160 g (⅔ cup) Greek style vegan yogurt, 144 g (⅔ cup) neutral oil (I use olive), 240 g ( 1 cup + 3 Tablespoons) caster or granulated sugar, 1 Tablespoon vanilla extract
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. Gently stir in the poppy seeds.
3 ½ teaspoons baking powder, ¼ teaspoon bicarbonate of soda (baking soda), ½ teaspoon salt, 400 g (3 + ⅓ cups) plain (all-purpose) flour, 3 Tablespoons poppy seeds
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 12 hole mufin tins with 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; they should be almost overflowing. 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 15 minutes, until a skewer inserted into the centre comes out clean.
Allow the muffins to cool in the tin for 5 minutes, then transfer them to a wire rack and leave to cool completely. Once cold store in an airtight container.