Sift together 1.5 cups all-purpose flour, 1 tsp baking soda, 1.5 tsp baking powder and ½ tsp sea salt in a large mixing bowl.
In another microwave safe bowl, melt ¼ cup salted butter. Whisk in ¼ cup white sugar until creamy.
To butter and sugar mixture, add 1.5 cups buttermilk, 1 egg and 1 tsp vanilla extract.
Pour wet ingredients into dry ingredients and mix just until combined into a thick batter. Don't overmix.
Heat griddle or skillet over medium-low heat. Add a pat of butter and let melt.
Scoop out ¼ cup of batter for each pancake. Be sure to leave a couple inches between each pancake and don't overcrowd the pan. Cook on first side until bubbles form on top of the batter and bottom is a nice golden brown. Flip and cook until remaining side is golden brown and batter is set.