In a large bowl whisk dry ingredients together, set aside.
In a 2-cup pyrex measuring cup combine buttermilk, egg and butter.
Add wet ingredients to dry mixture and whisk until combined. Let batter rest for 5 minutes.
Heat pancake griddle to 350°F. Lightly brush with vegetable oil.
Using a ladle or liquid measuring cup pour ¼ cup batter onto the griddle. Cook first side until bubbles appear on the pancake and the bottom side is golden brown, 2-3 minutes. Flip pancake and cook second side until cooked, 1-2 minutes.
Keep pancakes warm while cooking all the batter.