Preheat your oven to 375°F (190°C). Line a muffin tin with liners or lightly grease it. Rookie mistake: skipping this step = muffin disaster.
Mix dry ingredients: In a large bowl, whisk together flour, granulated sugar, brown sugar, baking powder, baking soda, and salt. Easy-peasy.
Mix wet ingredients: In another bowl, beat together milk, oil, egg, and vanilla extract until smooth.
Combine wet & dry: Pour the wet ingredients into the dry. Gently fold until just combined. Tip: a few lumps are okay—overmixing = tough muffins.
Fold in chocolate chips: Don’t skimp here. Make sure every bite has a happy chocolate surprise.
Fill muffin cups: Divide the batter evenly among 12 muffin cups. Sprinkle extra chocolate chips on top if you’re feeling fancy.
Bake: 18–22 minutes or until golden brown and a toothpick comes out clean (bonus points if it comes out with a chocolate smudge).
Cool slightly: Let muffins sit for 5–10 minutes in the tin before transferring to a wire rack. Patience, young padawan.