2sticks1 cup unsalted butter PLUS 1 EXTRA TABLESPOON butter
1¼cuppacked dark brown sugar
¼cupgranulated sugar
1large egg plus 1 egg yolk
1½teaspoonsvanilla extract
¾cupsemi-sweet chocolate chips
½cupmilk chocolate chips
½cupdark chocolate chips
Instructions
Beat the butter and sugars. Add the egg, yolk, vanilla. Add the 3 dry ingredients. Fold in all of the chocolate chips.
Preheat the oven to 350 degrees F. Line cookie sheet with parchment paper. Drop dough by tablespoons on to the sheet and bake 11-13 minutes. Eat immediately Cool on sheets.