Preheat your oven to 350°F (175°C).
Line your muffin tin with cupcake liners.
In a large mixing bowl, combine your cake mix or homemade vanilla cupcake batter. Mix until smooth.
Spoon the cupcake batter into each liner, filling them about 2/3 full.
Place the muffin tin in the preheated oven and bake for 18-20 minutes, or until a toothpick inserted in the center comes out clean.
Once baked, remove the cupcakes from the oven and let them cool for about 5 minutes, then transfer them to a cooling rack.
While the cupcakes are cooling, prepare your vanilla frosting.
Once cooled, use a small knife to remove a small circle from the top of each cupcake and fill with sprinkles.
Spread or pipe frosting on top of the cupcakes, and sprinkle more sprinkles on top.