Preheat a large griddle or frying pan to low-medium heat.
In a large bowl whisk together the flour, baking powder, baking soda, salt & sugar.
Whisk the Greek yogurt, milk, vanilla and eggs together until mixed well.
Gently fold the wet ingredients into the flour mixture using a rubber spatula or wooden spoon. Add the chocolate chis and fold in. (It’s ok if your batter is a little lumpy.)
Lightly grease your frying pan/griddle with oil or non-stick cooking spray.
For each pancake, pour ¼ cup of batter onto the griddle. I like to use my ice cream scoop and then spread the pancakes out a little!
Fry for 2-3 minutes, or until you see a few air bubbles on the uncooked side. Flip and continue to fry for 2-3 minutes on the second side or until golden.
Repeat making pancakes with the rest of the batter.
Serve warm with butter, maple syrup and/or whipped cream!