Preheat the oven to 400 degrees and arrange a min muffin pan with 24 paper liners, setting it aside.

Combine flour, sugar, salt, and baking powder in a bowl, then proceed to add milk, oil, and egg.

Thoroughly mix these ingredients until a uniform mixture is obtained. Gently incorporate the rainbow sprinkles.

Fill each muffin cup about ¾ full with the prepared batter

Place the muffin pan in the preheated oven and bake until the centers of the muffins are fully set and the tops achieve a golden brown hue, typically taking around 10-15 minutes. Cool for 15 minutes and enjoy!