Preheat the oven to 180°C conventional (160°C fan-forced). Line a muffin tray with muffin cases.
Add the milk and lemon juice to a jug, stir and let it sit for about 5 minutes.
1 cup milk, 1 lemon
In a mixing bowl, place the beaten eggs, oil, vanilla, lemon zest and the milk mixture. Stir to combine.
2 eggs, 1/2 cup vegetable oil, 1 teaspoon vanilla extract, 1 lemon, 1 cup milk
In another large bowl, combine the flour, caster sugar, baking powder and salt. Then add the wet ingredients from the other bowl. Stir until just combined, being careful not to over mix. Gently fold in the raspberries.