Sift einkorn flour, sugar, baking powder, cinnamon, and salt together into a medium-sized bowl.
Whisk buttermilk, eggs, melted butter, and vanilla extract together in a bowl. Slowly add flour mixture to buttermilk mixture and stir until just combined.
Heat a griddle over medium-high heat and grease with butter. Drop 1/4 cup batter onto the hot griddle and cook until bubbles form, the edges are dry, and pancake is brown on the bottom, 2 to 3 minutes. Flip and cook until browned on the other side, 2 to 3 minutes. Repeat with remaining batter.
