Heat the maple syrup. Because pouring cold syrup over a stack of steaming hot pancakes makes no sense at all!
Sift together flour, baking soda, baking powder, salt, and sugar.
Beat eggs in a medium bowl. Add milk, yogurt or sour cream, sourdough starter, and vanilla to the eggs. Mix just to combine. Do not over mix.
Add dry ingredients to the egg mixture, stirring to combine. Lumps are ok. They help to create the pockets of air that make pancakes fluffy.
Stir in melted butter. Set bowl aside and wait about 30 minutes to let the batter rise a bit.
Make some coffee, gather up some toppings or take a shower. :-)
Lightly spray a skillet and heat on medium high until sizzling. Turn heat down to medium and drop the batter in spoonfuls onto the skillet. Cook until light brown and bubbles start to appear on top, then flip to cook the other side, about 1 minute. Flip only once.
You might need to adjust the amount of milk depending on the stiffness of your sourdough starter and your preferred batter consistency. The above ingredients work well for my sourdough starter; if you’re using a stiff starter, you might want to add around 1/2 cup more milk.