In a small bowl, whisk together eggs and vanilla. Set aside.
In a separate small bowl, stir together flour, sugar, baking soda, and salt.
In a medium bowl, stir together the sour cream with the dry ingredients until just barely combined (don't overmix.) Whisk in the egg mixture until just combined.
Heat a griddle over medium-low heat and melt some butter in the pan. Drop batter by 1/4 cup servings onto the griddle. Cook on the first side until bubbles start to form on the surface and edges are starting to brown. Flip to the other side and cook for another minute. (Pancakes will be a little on the soft side.)
Serve with softened butter and syrup.
Here's a calorie count using NF Greek Yogurt instead of sour cream. I always double the recipe and guess that I use about 2 T of butter total to cook them all in. Doubled recipe made 29 pancakes, using 1 oz/2 T scoop. 1 pancake (including butter it was cooked in) = ~45 kcal