In a large mixing glass bowl, combine the softened butter, sugar, and brown sugar.
Add the egg and mix well.
Stir in the sourdough starter and vanilla extract (or powder).
Add the vinegar to the baking soda so it will get foamy and then add to the mixture.
Add the flour, salt.
Finally add the chocolate chips, mix and place in the fridge for 15 mins or overnight.
Take out of fridge and use the ice cream scooper to scoop the dough and place on a parchment paper on top of a baking sheet.
Bake for 10-12 mins. Until the bottom of the cookie is golden.
Notes
Make sure you don’t over bake. It may seem like its not baked, DON’T worry it will continue to bake and be cooked throughout after being out of the oven for a few minutes.
To Freeze: You can scoop the dough and place on a parchment paper. Place into the freezer to freeze the cookie dough. Once frozen keep in a plastic bag or air tight container.
Less fluffy and more chewy, bake for about 8 mins.
Remember that everyone ovens, sourdough starters are different and can play a role in the outcome.