Pre-heat oven to 350 degrees. Mix oil and sugar. Add egg, vanilla, salt, and baking soda. add flour. Pour in buttermilk and mix. Scoop into lined cupcake pan. Bake for 15-20 minutes or until browned. Cool on wire rack.
Buttercream Frosting
Mix ingredients for frosting. Put into a piping bag with a tip attached. Pipe frosting onto cupcakes. Sprinkle with gold sprinkles.