In a large bowl (or a medium bowl if you're daring), mix the flour, sugar, baking powder, and salt.
In a separate large bowl, add the milk, eggs, olive oil, and vanilla extract (or maple syrup, or other extract of choice). Whisk it together like your life depends on it.
If you're using any mixins (blueberries, chocolate chips, cinnamon, etc.), add them in now. Add liquids to the liquids, and solids with the solids. EXCEPTION: If you're using instant coffee and/or any kind of zest, add it to the liquids.
Make a well* in the center of the dry ingredients. Slowly pour the liquid ingredients in there and stir. I like to use a rubber spatula at this step, but the choice is yours. Try not to overmix the batter. Don't worry if there are a few chunks here and there.
Line a muffin pan with paper baking cups. This recipe makes about 12 muffins. Fill the cups about 3-quarters full.
Bake at 425°F for 15 minutes (or until a toothpick inserted at the highest peak comes out clean). Once they have cooled, remove them from the pan and lay them on a rack to cool.