Combine flour, buckwheat, cocoa, sugar, baking powder, and salt in a large bowl.

Whisk together eggs, milk, and vegetable oil and add to the dry mix. Whisk to combine. If leaving until tomorrow, cover and put in the refrigerator. If cooking today, let the batter rest a bit.

Cook on a hot, greased pancake griddle.

Flip when bubbles appear on the tops and cook for two more minutes