Preheat oven to 350. Line baking sheets with parchment paper
Whisk together in a bowl flour, baking soda and salt, set aside
In a large bowl beat butter and both sugars until light and fluffy about 2 minutes
Add egg, egg yolk and vanilla and beat in.
Add flour mixture and stir until well blended but don't overmix
Fold in holiday chips and kit kat bars being careful not to break up kit kat bars
Roll dough into 1 1/2 inche balls, press top lightly to flatten slightly, place 2 inches apart on preparedcpans
Bake for 13 to 15 minutes until light golden. Don't overcook for chewy cookies, they should look soft, they will firm uo when cool.cool 5 minute on pan r then transfer to a wire rack to cool completely
