Preheat oven to 375°F
In a bowl mix flour, baking soda, and salt.
In a separate bowl use a mixer to cream the butter, then add sugar and brown sugar and continue to mix.
Once sugar and butter is combined add eggs and vanilla extract.
Add flour to the butter mixture a little at a time until fully incorporated.
Add chocolate chips and pretzels and mix in gently.
Spray muffin tin with cooking spray.
Fill each muffin tin 2/3 of the way full of cookie dough. You can just scoop it in no need to pack it.
Bake for 9-11 minutes.
Once baked remove from oven and use a pastry tamper or another small round object, to press down the middle of the cookies.
Let cool for 5 minutes then remove from muffin tin while still warm.
Let cool completely before serving.
Can be stored in an airtight container for a week.