Preheat oven to 350°F. Prep 2 baking sheets with parchment and set aside.

In the bowl of a stand mixer fitted with a paddle attachment, beat butter and both sugars for about 3 minutes. Add in vanilla and mix.

Next add in the eggs and egg yolk, one at a time, beating after each addition.

In a separate bowl, combine flour, salt, baking powder and baking soda and whisk together. Once combined, slowly add into the wet mixture and stir.

Add in the chocolate chips, butterscotch chips and pretzels and combine using a spatula. (So the pretzels don't get broken up too much!)

Scoop balls of dough on prepared baking sheet. Using slightly damp fingertips, press dough down and out into disks. Sprinkle on some flakey sea salt and press 1 pretzel into the top of each cookie.

Bake for 11-12 minutes or until the edges turn a golden brown. Let cool on cooling rack. Enjoy!