Begin by preheating your oven to 350°F (175°C). Prepare a muffin tin by greasing it or lining it with paper cups. In a mixing bowl, whisk together the flour, sugar, baking powder, salt, and poppy seeds until they are well mixed.
In a separate bowl, combine the milk, vegetable oil, eggs, vanilla extract, lemon zest, and lemon juice. Mix these wet ingredients until they are fully incorporated.
Pour the wet ingredients into the dry ingredients and gently fold them together until just combined. Be careful not to overmix to keep the muffins light and fluffy.
Scoop the batter into the prepared muffin tin, filling each cup about two-thirds full. Bake in the preheated oven for 18-20 minutes, or until a toothpick inserted into the center comes out clean.
Once baked, let the muffins cool in the pan for a few minutes before transferring them to a wire rack to cool completely. Enjoy these delicious muffins warm or at room temperature!
Notes
These muffins are best enjoyed fresh, but they can be stored in an airtight container for a few days.