Mix the flour, sugar, baking powder, baking soda and salt in a medium bowl.
Mix the milk, egg, oil and vanilla in a small bowl.
Add the milk mixture to the flour mixture and stir gently with a rubber spatula until just combined, the batter will still be a little lumpy. Let the batter sit for 10 minutes.
Spray a nonstick pan with vegetable oil spray and heat over medium heat until hot, about 1 minute.
Use a squeeze bottle or measuring cup to pour the batter on the pan. Make sure to leave space so they don’t stick together. When the batter is bubbly all over flip and cook the other side until done.