Preheat oven to 350°F.
Grease two 8-inch cake pans with Pam, line with parchment rounds and spray again.
Beat the butter and sugar together .
Add oil, eggs, vanilla, baking powder, and salt, combining well.
On low, alternate adding the buttermilk and flour until blended.
Mix in sprinkles.
Divide into pans and bake approx 45 mins. (Mine too a few extra mins to cook through)
Cool until just warm and flip onto a rack.
I like to freeze the layers and then use a serrated knife to divide each layer in half.
I only used 3 layers for this cake.
Save the 4th for snacking or cake pops.