Combine buttermilk, oats, and vanilla in a small bowl; let stand 10 minutes, stirring occasionally..Stir in oil and egg..

Combine flour, brown sugar, baking soda and salt in a large bowl, stir well. Add oat mixture to flour mixture, stirring until smooth.

Spoon about 1/3 cup batter in hot nonstick skillet...Turn when tops are covered with bubbles and edges look cooked.