Preheat oven to 350. Prepare two 6x3-inch cake pans by lining with parchment and greasing.
Add dry ingredients to the bowl of a stand mixer and stir until well combined. Add milk, vegetable oil, eggs, and vanilla and mix until well combined. Add boiling water, and mix on high speed for 1 minute.
Distribute batter between the cake pans and bake for 30-35 minutes, or until a toothpick tests clean. Allow to cool and use a knife to release the sides before removing from the pan.