Preheat oven to 425 degrees F and grease a sheet pan with cooking spray.
In a bowl, whisk together the flour, baking powder, sugar, and salt.
In a separate bowl, mix together milk, egg, and oil.
Now combine the 2 bowls and whisk until smooth.
Fold in any additional ingredients. We like to use strawberries, blueberries, or chocolate chips.
Pour onto your sheet pan and try to smooth out batter into an even layer.
Bake for 15 to 20 minutes. Enjoy!