1. Preheat oven to 350 degrees. Line cupcake tin with paper liners.
2. In a small bowl, whisk together flour, baking powder, and salt. Set aside.
3. Add the butter to the bowl of an electric mixer and beat until creamy. Add sugar and beat with the butter on high speed until fluffy. Add the egg and egg white, mixing well on medium speed until combined. Scrape down sides of the bowl as needed.
4. Add the oil and vanilla extract, beating on medium speed for another minute. With the mixer on low, add half of the dry ingredients and blend. Pour in the milk and blend. Add the other half of the flour mixture and mix on medium speed until the batter is combined. Use a large spatula to gently stir in the sprinkles.
5. Fill the cupcake liners 2/3 full. Bake until tops are set, about 18-20 minutes. Let cool completely before frosting.

Vanilla Cream Frosting

1. Add the butter and cream cheese to the bowl of an electric mixer and beat on high speed until creamy. With the mixer on low slowly add the powdered sugar. Beat until sugar is incorporated, then add the vanilla. Scrape down sides of the bowl if needed and beat the frosting on high speed for 2-3 minutes, until fluffy and creamy. If the frosting seems too thick, beat in the milk for 1-2 minutes until combined.
2. Frost the cupcakes and top with sprinkles!