In a medium size mixing bowl stir together the dry ingredients: flour, sugar, baking powder and salt.
Now add the wet ingredients: milk, oil, egg, and vanilla extract. Stir these in until wet batter forms.
Heat your waffle iron according to the directions. When ready add 1/4 cup batter (or more or less depending on your size waffle iron) and cook until done. My waffle iron has a green light that lights up when the waffle is done, but I usually add another 30 seconds on to this for a crispy exterior.
Serve warm with butter and maple syrup.
Notes
You can use granulated white sugar instead of brown sugar if needed. I like the flavor brown sugar adds, but white sugar is perfectly fine too.
I tend to use canola or vegetable oil but any liquid cooking oil will work. If your oil has a strong flavor, like some olive oils and coconut oil, this will impart that flavor to your waffles.
You can add 1/4 teaspoon cinnamon or pumpkin pie spice to add more flavor to this recipe.
Waffle irons can vary quite a bit in size and how hot they get, so you will need to read the instructions of yours and experiment to get the prefect cook time.