Preheat oven to 350 degrees F. Generously spray a mini muffin tin with nonstick spray. I like to use nonstick baking spray but regular nonstick cooking spray will work as well.
In a medium mixing bowl whisk together the dry ingredients, i.e. the all purpose flour, granulated sugar, baking powder, baking soda, and salt.
2 ¾ cups all-purpose flour, 1 tablespoon baking powder, 1 teaspoon baking soda, ½ teaspoon salt, 1 ¼ cups granulated sugar
In a large mixing bowl combine the oil, eggs, milk, and vanilla extract, making sure the eggs are fully incorporated.
½ cup vegetable oil, 3 eggs, ½ cup milk, 3 teaspoon vanilla extract
Gradually pour the dry ingredients from the medium bowl into the wet mixture in the large bowl, stirring just until combined. Be careful not to overmix. Overmixing will lead to dense muffins that don't rise properly. The mixture should be fluffy and moist. A good rule of thumb is to stop mixing as soon as the dry ingredients have dissolved into the wet ingredients.
Gently fold the sprinkles into the muffin batter until evenly distributed throughout.
¾ cup multicolor sprinkles
Drop ½ to 1 tablespoon of batter into each cup of the mini muffin tin.
Bake in the preheated oven for 7 minutes on the middle rack or until the little bites muffins are golden brown and fully baked. You can confirm that that are baked through using the toothpick method.
Allow the muffins to cook in the muffin pan for 5 to 10 minutes before transferring them to a wire rack.