Pre-Heat oven to 350°F. Add muffin liners to 15 muffin cups. Add oil and sugar to a stand mixer and blend. Add in vanilla and egg. Mix again. Add dry ingredients. Pour in buttermilk and beat on medium speed of stand mixer 2 minutes. Stir in boiling water. Use a cookie scoop to fill each muffin well 1/2- 3/4 full. Bake 15-20 minutes. Cool on a wire rack.