I like Alton Brown's recipe.
Note: When baking, you should always measure stuff like flour by WEIGHT, and preferably in more accurate metric grams. You'll control the results much better this way. But I'm including cups/teaspoons anyway.
For about 10-12 pancakes:
Wet stuff:
1 cup buttermilk* - room temp.
1 large egg, room temp.
28 g (2 tbsp) butter - melted, then slightly
* You can add 1 tbsp lemon juice to 1 cup milk to get buttermilk. Just let it sit a couple of minutes.
Whisk egg into melted butter, then whisk in buttermilk.
Dry stuff:
135 g (1 cup) flour
1/2 tsp salt
1/2 tsp baking powder
1/4 tsp baking soda
21 g (1 1/2 tbsp) sugar
sift dry ingredients. I like to just whisk it for about a minute.
Add wet stuff to dry stuff, and mix ONLY UNTIL IT'S JUST COME TOGETHER. Do not mix smooth. You will have tough pancakes if you do.
Let it stand five minutes so that the batter won't be runny, and preheat griddle over medium-low to medium heat while you wait.
Butter griddle, wipe away excess with a paper towel and be careful not to burn yourself when you do, then cook your pancakes. I use a disher (the scoop with the release that most people use for ice cream).
The only thing about this recipe that's kind of a pain is that you have to plan ahead and set out your buttermilk and egg to warm up. If you try to mix a cold egg into melted butter, it will just cause the butter to form solid pieces, which isn't good for the final mix. However, if pressed for time you can warm up the egg by placing it in a bowl of warm water and you can microwave the milk over low power for two or three minutes. But it's well worth the effort.