Preheat Oven and Grease Pan:
Heat the oven to 350°F (175°C) and coat a mini-muffin pan generously with nonstick spray.Whisk Wet Ingredients:
In a bowl, whisk together oil, eggs, milk, and vanilla until the eggs are completely blended.Mix Dry Ingredients:
In a second bowl, mix flour, baking powder, baking soda, salt, and sugar until uniform.Combine Wet and Dry:
Slowly add the dry mix to the wet, stirring only until combined. Avoid overmixing; the batter should be light and moist. Stop when no dry streaks remain.Fold in Sprinkles:
Carefully fold in the sprinkles until they are evenly dispersed.Fill Muffin Cups:
Fill each mini-muffin cup with 1/2 to 1 tablespoon of batter.Bake Muffins:
Place the pan on the middle rack and bake at 350°F (175°C) for 7 minutes, or until a toothpick inserted comes out clean.Cool Muffins:
Let the muffins cool in the pan for 5-10 minutes, then move them to a wire rack to cool fully.Serve and Enjoy:
Serve and enjoy!