First things first, preheat that oven to 350°F (175°C). Go ahead and line a muffin tin with paper liners. This makes for easy cleanup and keeps your muffins lookin’ all pretty.
Grab yourself a medium bowl and whisk together the flour, sugar, baking powder, cinnamon, and salt. This ensures that your muffins get that perfect rise and every bite has just the right amount of spice.
In a separate large bowl, whisk together the milk and eggs until they’re well combined. You wanna make sure those eggs are fully incorporated into the milk. Next, stir in the melted butter and vanilla extract. Your kitchen should already be smellin’ good with that vanilla in the air!
Now it’s time to bring it all together. Gradually add the dry ingredients into the wet ingredients, stirring gently until everything’s combined. Don’t overmix – we’re makin’ muffins, not bread! Overmixing can lead to tough muffins, and we want ‘em light and fluffy.
Once your batter is nice and smooth, gently fold in the diced apples. Make sure the apple chunks are evenly distributed throughout the batter so you get that perfect apple bite in every muffin.
Spoon the batter into your prepared muffin tin, filling each cup about 3/4 full. If you wanna go the extra mile, sprinkle a little cinnamon-sugar mixture on top before they hit the oven. This gives the muffins a nice, sweet crunch on top.
Pop the muffins in the oven and bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean. Keep an eye on ‘em – you don’t want these beauties to overbake. Once they’re done, let them cool in the pan for a few minutes before transferring them to a wire rack to cool completely.
That’s it, folks! Now all that’s left is to enjoy the fruits of your labor. Serve these Apple Cinnamon Muffins warm with a dab of butter, or save ‘em for later – if they last that long!