Preheat Your Oven: Start by preheating your oven to 375°F (190°C). Line your muffin tin with paper liners or lightly grease the cups.
Mix the Dry Ingredients: In a large mixing bowl, whisk together the flour, granulated sugar, brown sugar, baking powder, and salt.
Combine Wet Ingredients: In a medium mixing bowl, whisk together the melted butter, milk, eggs, and vanilla extract until well combined.
Create the Batter: Pour the wet ingredients into the dry ingredients and stir gently with a spatula until just combined. Be careful not to overmix; the batter should be slightly lumpy.
Fold in the Chocolate Chips: Gently fold in the chocolate chips, ensuring they are evenly distributed throughout the batter.
Fill the Muffin Tin: Spoon the batter into the prepared muffin tin, filling each cup about 2/3 full.
Bake the Muffins: Place the muffin tin in the preheated oven and bake for 20-25 minutes, or until a toothpick inserted into the center of a muffin comes out clean.
Cool and Enjoy: Allow the muffins to cool in the tin for about 5 minutes before transferring them to a cooling rack to cool completely. Enjoy your delicious chocolate chip muffins warm or at room temperature.