Preheat oven to 350. Line 3 dozen cupcake cups with parchment.
Cream butter, oil, and sugar until fluffy. Beat in eggs, one at a time. Beat in vanilla.
Whisk together dry ingredients. Add alternaturely to creamed mixture, with buttermilk. Fold in sprinkles.
Bake approximately 15 minutes. Turn out of baking pans and cool or wire racks.