Preheat and prep
Preheat your oven to 190°C / 375°F. Line a muffin tin or grease it well. Future you will be grateful.
Mix the dry stuff
In a large bowl, whisk flour, sugar, poppy seeds, baking powder, and salt. Keep it light—no aggressive whisking.
Mix the wet stuff
In another bowl, whisk melted butter, eggs, milk, lemon juice, lemon zest, and vanilla. It should smell like happiness.
Bring it together
Pour wet ingredients into dry. Stir gently until just combined. Overmixing is the enemy of tender muffins.
Fill the muffin cups
Divide batter evenly, filling each about ¾ full. This is how you get those nice rounded tops.
Bake
Bake for 18–22 minutes until tops are lightly golden and a toothpick comes out clean. Resist opening the oven every 2 minutes.
Cool and (optionally) glaze
Let muffins cool slightly. Drizzle with lemon glaze if you’re feeling fancy—or emotionally fragile.