Preheat oven to 350F degrees.
Mix egg and oil with a fork until well combined. Add in milk and extract and mix again.
Add in flour, sugar, baking powder, and salt. Mix until just combined.
Place the batter into donut pan and fill the cavities 3/4 to the top. I only had 1 donut pan so I filled the 6 cavities and also oiled ramekins to make tiny cakes with the leftover batter.
Bake for 10-12 minutes or until a fork comes out clean. Mine took about 11 minutes.