Preheat oven to 375 degrees F (190 degrees C). Line a 12-cup muffin tin with foil and spray with cooking spray.
In a medium bowl, whisk together flour, baking powder, and baking soda.
In the same bowl, stir together salt and butter until well mixed.
With an electric mixer on medium speed, beat sugar and eggs for about 3 minutes or until light and fluffy.
Add vanilla extract and mix until combined.
Add dry ingredients to wet ingredients and mix just until combined.
Spoon batter evenly into the prepared muffin tin.
Sprinkle mini sprinkles over the batter.
Bake for 20 minutes or until a toothpick inserted into the center comes out clean.
Cool in pan for 5 minutes before removing.