Whisk together the pancake mix, baking soda, and salt in a medium bowl.
In a large bowl, mix eggs, sour cream, sugar, and vanilla together.
Add the wet ingredients to the dry ingredients and stir until moistened. There may be small lumps, but do not over-mix.
Heat a griddle to medium heat, about 300-325 degrees. Spray with nonstick spray or brush with one tablespoon of butter.
Add ¼ cup of batter for each pancake to the hot griddle or hot skillet. Cook the first side for 2-3 minutes.
When the edges begin to bubble and the center of the pancake is set, flip the pancakes and cook for 1-2 minutes on the second side.
Serve with your favorite toppings like butter and warm syrup.