Preheat a cast iron skillet over medium heat.
If using fresh milled buckweat flour, mill your groats on a fine setting of your grain mill.
In a bowl, add the milk, oil, egg, and vanilla. Mix well.
In a separate bowl, add the flour, baking soda, baking powder, salt, and sugar. Mix until completely combined.
Pour the wet ingredients over the dry ingredients and mix until just combined.
Add a teaspoon of butter or oil to the preheated pan.
Scoop 1/3 cup of pancake batter into the preheated skillet.
Cook for 2-3 minutes. Flip and cook an additional 1-2 minutes until golden brown.
TIP: The pancake is ready to flip when bubbles come to the surface.