Preheat the oven to 350°F and line your baking sheet with parchment paper.
Whisk egg yolks, sugar, melted butter and vanilla extract together until combined.
2 Egg yolks, ¼ Cup Granulated sugar, ½ Cup Brown sugar, ½ Cup + 1 Tablespoon Unsalted butter, 1½ teaspoon Vanilla Extract
Fold in your sifted flour, baking powder, baking soda and salt and mix until smooth.
1 Cup All-purpose flour , ½ teaspoon Baking powder, ¼ teaspoon Baking soda, teaspoon Kosher salt
Add the chocolate, butterscotch chips and toffee folding everything into the dough.
½ Cup Dark Chocolate Chips, ½ Cup Butterscotch Chips, ¼ Cup Toffee Bits
Form dough into balls using a small cookie scoop, or about 1.5 Tablespoons, and place on a parchment-lined baking sheet or plate. Place in the fridge to chill for about 20-30 minutes.
Bake for 10 minutes before removing from the oven, topping with flakey salt and reshape as desired by using a large circular cookie cutter to round out the edges.
Flakey sea salt
Allow the cookies to cool on the baking sheet for 5 minutes before transferring to a cooling rack.